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The VTS recommends mariners confirm their position in the GIWW with their Electronic Chart Display and Information Systems (ECDIS).  Bolivar Aids to Navigation are set in shoal water.  The VTS recommends confirming Bolivar Peninsula Virtual Aids to Navigation 19A (Bolivar Peninsula 19A V-AIS, LLNR-35942) and 22 (LLNR-35947) prior to making the turn to/from Bolivar and/or into the Alternate Inbound Channel.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-94.77758,29.37902],[-94.78525,29.37291],[-94.78722,29.37171],[-94.78622,29.36877],[-94.78458,29.37104],[-94.77639,29.37807],[-94.77758,29.37902]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":27034,"geometry":{"type":"Polygon","coordinates":[[[-95.02708999999999,29.730990000000077],[-95.02961999999997,29.728230000000053],[-95.02648999999997,29.72685000000007],[-95.02343999999994,29.723670000000027],[-95.02227999999997,29.72195000000005],[-95.02219999999994,29.70963000000006],[-95.02114999999998,29.70682000000005],[-95.02019999999999,29.703630000000032],[-95.01637999999997,29.701230000000066],[-95.01214999999996,29.700200000000052],[-95.00526999999994,29.699420000000032],[-95.00026999999994,29.698020000000042],[-94.99719999999996,29.696210000000065],[-94.99242999999996,29.69247000000007],[-94.98700999999994,29.688120000000026],[-94.98599999999999,29.68635000000006],[-94.98328999999995,29.68264000000005],[-94.98258999999996,29.681730000000073],[-94.98028999999997,29.676810000000046],[-94.97775999999999,29.677000000000078],[-94.98045999999994,29.684380000000033],[-94.98346999999995,29.68807000000004],[-94.99367999999998,29.696800000000053],[-94.99946999999997,29.70008000000007],[-95.00384999999994,29.701490000000035],[-95.01109999999994,29.702350000000024],[-95.01393999999999,29.70321000000007],[-95.01629999999994,29.704770000000053],[-95.01817999999997,29.70709000000005],[-95.01908999999995,29.70876000000004],[-95.01942999999994,29.710330000000056],[-95.01950999999997,29.719940000000065],[-95.01968999999997,29.721990000000062],[-95.02036999999996,29.72371000000004],[-95.02152999999998,29.725610000000074],[-95.02543999999995,29.729870000000062],[-95.02708999999999,29.730990000000077]]]},"properties":{"ESRI_OID":27034,"MSI_UID":27034,"ATU":8,"TITLE":"Galveston Bay Entrance Channel - Houston Ship Channel/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100117414264,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:sechouexcecozon:sechoutersea:sechousublanact:galbayentcha:houshicha","WATERWAY_NAME":"Houston Ship Channel","CREATE_DATE":1756391160000,"MODIFIED_DATE":1756398024000,"BEGIN_DATE":1756339200000,"END_DATE":2082758399000,"DESCRIPTION":"Houston Ship Channel - Morgans Point - VTS USI Canal/San Jacinto Bay Channel Directive --- The USI Canal/San Jacinto Bay Channel has become increasingly trafficked over the last 2 years.  For various reasons, many tows attempt to reconfigure between Morgans Point and Exxon to go into or come out of the USI Canal.  This practice has resulted in several near miss situations between Morgans Point and the Exxon Terminal in the Houston Ship Channel.  In order to fulfill the VTS mission of reducing risk of collision, allision, damage, pollution, and injury, the following Directive is in effect and will be written as policy in documentation updates to the U.S. Coast Guard VTS Houston-Galveston User Guide: • Vessel Traffic Service Houston-Galveston Directs no barge work in the Houston Ship Channel between Morgans Point and Exxon for purposes of going into/out of the USI Canal. • ","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-95.02709,29.73099],[-95.02962,29.72823],[-95.02649,29.72685],[-95.02344,29.72367],[-95.02228,29.72195],[-95.0222,29.70963],[-95.02115,29.70682],[-95.0202,29.70363],[-95.01638,29.70123],[-95.01215,29.7002],[-95.00527,29.69942],[-95.00027,29.69802],[-94.9972,29.69621],[-94.99243,29.69247],[-94.98701,29.68812],[-94.986,29.68635],[-94.98329,29.68264],[-94.98259,29.68173],[-94.98029,29.67681],[-94.97776,29.677],[-94.98046,29.68438],[-94.98347,29.68807],[-94.99368,29.6968],[-94.99947,29.70008],[-95.00385,29.70149],[-95.0111,29.70235],[-95.01394,29.70321],[-95.0163,29.70477],[-95.01818,29.70709],[-95.01909,29.70876],[-95.01943,29.71033],[-95.01951,29.71994],[-95.01969,29.72199],[-95.02037,29.72371],[-95.02153,29.72561],[-95.02544,29.72987],[-95.02709,29.73099]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":37972,"geometry":{"type":"Polygon","coordinates":[[[-85.83876999999995,24.65330000000006],[-83.90578999999997,29.350270000000023],[-83.91228999999998,30.30803000000003],[-84.57308999999998,30.403350000000046],[-84.57251999999994,30.722540000000038],[-83.72809999999998,31.907230000000027],[-83.86010999999996,32.38245000000006],[-85.02223999999995,32.981100000000026],[-85.43489999999997,34.66343000000006],[-86.25517999999994,34.30780000000004],[-88.13701999999995,34.474050000000034],[-88.56853999999998,34.61811000000006],[-88.78859999999997,35.147460000000024],[-90.25727999999998,34.89570000000003],[-90.83132999999998,34.035060000000044],[-90.94803999999993,33.26222000000007],[-90.14380999999997,33.08283000000006],[-90.86748999999998,32.41316000000006],[-90.91131999999999,31.762870000000078],[-91.32119999999998,31.665230000000065],[-91.22725999999994,30.945750000000032],[-89.97107999999997,30.850720000000024],[-89.75409999999994,30.125000000000057],[-89.28137999999996,30.023540000000025],[-88.17263999999994,28.910480000000064],[-88.13760999999994,25.68966000000006],[-86.45902999999998,26.301390000000026],[-86.71126999999996,25.153130000000033],[-85.83876999999995,24.65330000000006]]]},"properties":{"ESRI_OID":37972,"MSI_UID":37972,"ATU":8,"TITLE":"Sector Mobile MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1772198454000,"MODIFIED_DATE":1772198466000,"BEGIN_DATE":1753401600000,"END_DATE":1861919999000,"DESCRIPTION":"Marine Safety Alert 02-24 - Inspections and Compliance Directorate --- DANGEROUS BYCATCH FROM DISCARDED MUNITIONS REMAINS A PRESENT DAY HAZARD --- This Safety Alert is being issued to raise awareness of lurking hazards caused by discarded munitions, which often contain active explosives or chemical agents. Although the practice of dumping munitions into the sea ceased in 1970, a significant amount remains hidden in coastal waters, posing a safety hazard to commercial fisherman, dredge operators, and others who trawl and work the ocean floor. \nRecently, a deckhand on a clamming vessel was severely burned when a canister was dredged up and brought onboard with clams and other debris. The canister likely contained mustard gas or another blistering agent, but did not display any obvious visual, audible, or odor indicators of discharging content. A member of the crew discovered the canister and threw it back overboard. Several hours later he developed a severe rash that required professional medical treatment. \nMustard gas is a chemical weapon developed during World War I. Millions of pounds of this product, other chemical weapons, bombs, torpedoes, artillery shells, and munitions were routinely disposed of and remain in U.S. coastal waters. Although many munition dump areas are well marked on navigation charts, numerous areas where munitions were discarded remain unmarked. There is also evidence suggesting that munitions were frequently “short dumped,” meaning dumped outside of the designated areas by contractors hired to take them to the intended locations. \nThe Coast Guard previously issued Safety Alert 11-16 and Safety Alert 6-10 on this same topic and continues to strongly recommend that persons involved in the fishing and dredging industries: \nReview their navigational charts to ensure the areas in which they are trawling or dredging are not near labeled “Explosives Dumping Areas.” Such areas must be given wide berth and seafarers should recognize that surface bottoms change and that objects can move significant distances from their original disposal areas. \nReview and follow recommendations from the Maritime Industry 3Rs Explosive Safety Guide. \nCarefully record the position of any munitions encountered and returned to the sea. \nImmediately report discovery to the National Response Center, at (800) 424-8802 to ensure a proper response and potential recovery. Alternatively, the local U.S. Coast Guard unit may be notified via VHF-FM Channel 16.  This Safety Alert is provided for informational purposes only and does not relieve any domestic or international safety, operational, or material requirement. Developed by the Office of Commercial Vessel Compliance (CG-CVC) and distributed by the Office of Investigations and Casualty Analysis (CG-INV). 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Although the practice of dumping munitions into the sea ceased in 1970, a significant amount remains hidden in coastal waters, posing a safety hazard to commercial fisherman, dredge operators, and others who trawl and work the ocean floor. \nRecently, a deckhand on a clamming vessel was severely burned when a canister was dredged up and brought onboard with clams and other debris. The canister likely contained mustard gas or another blistering agent, but did not display any obvious visual, audible, or odor indicators of discharging content. A member of the crew discovered the canister and threw it back overboard. Several hours later he developed a severe rash that required professional medical treatment. \nMustard gas is a chemical weapon developed during World War I. Millions of pounds of this product, other chemical weapons, bombs, torpedoes, artillery shells, and munitions were routinely disposed of and remain in U.S. coastal waters. Although many munition dump areas are well marked on navigation charts, numerous areas where munitions were discarded remain unmarked. There is also evidence suggesting that munitions were frequently “short dumped,” meaning dumped outside of the designated areas by contractors hired to take them to the intended locations. \nThe Coast Guard previously issued Safety Alert 11-16 and Safety Alert 6-10 on this same topic and continues to strongly recommend that persons involved in the fishing and dredging industries: \nReview their navigational charts to ensure the areas in which they are trawling or dredging are not near labeled “Explosives Dumping Areas.” Such areas must be given wide berth and seafarers should recognize that surface bottoms change and that objects can move significant distances from their original disposal areas. \nReview and follow recommendations from the Maritime Industry 3Rs Explosive Safety Guide. \nCarefully record the position of any munitions encountered and returned to the sea. \nImmediately report discovery to the National Response Center, at (800) 424-8802 to ensure a proper response and potential recovery. Alternatively, the local U.S. Coast Guard unit may be notified via VHF-FM Channel 16.  This Safety Alert is provided for informational purposes only and does not relieve any domestic or international safety, operational, or material requirement. Developed by the Office of Commercial Vessel Compliance (CG-CVC) and distributed by the Office of Investigations and Casualty Analysis (CG-INV). 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Primarily beginning 2 hours prior to the scheduled launch window of any rocket launches. The restricted area would remain in effect until suspended by Space Launch Delta 45.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-80.68643,28.72621],[-80.68,28.7183],[-80.66815,28.70423],[-80.65828,28.6909],[-80.6448,28.67366],[-80.63142,28.65521],[-80.6188,28.6369],[-80.60292,28.61837],[-80.58447,28.59795],[-80.57708,28.588],[-80.57374,28.57948],[-80.56996,28.56976],[-80.56859,28.5626],[-80.56756,28.55182],[-80.56533,28.54247],[-80.56284,28.53357],[-80.55829,28.52279],[-80.55829,28.52188],[-80.55271,28.50967],[-80.55099,28.50635],[-80.54945,28.50439],[-80.54181,28.48953],[-80.53726,28.47964],[-80.52962,28.46644],[-80.5285,28.46599],[-80.52576,28.45972],[-80.52559,28.45776],[-80.52541,28.45346],[-80.52662,28.45037],[-80.52902,28.44908],[-80.53631,28.44735],[-80.5376,28.44788],[-80.54052,28.4472],[-80.56224,28.43784],[-80.56859,28.43361],[-80.57666,28.42554],[-80.58275,28.41678],[-80.58524,28.41195],[-80.55726,28.40334],[-80.54979,28.41467],[-80.54756,28.41587],[-80.54069,28.41919],[-80.53082,28.42267],[-80.52215,28.42455],[-80.51486,28.42682],[-80.51168,28.42825],[-80.5073,28.43105],[-80.50404,28.43474],[-80.50121,28.43814],[-80.49829,28.44373],[-80.49675,28.44969],[-80.49649,28.45595],[-80.49718,28.46221],[-80.49846,28.46802],[-80.50233,28.47564],[-80.51263,28.4939],[-80.51915,28.50695],[-80.52799,28.52241],[-80.53245,28.53335],[-80.53692,28.54993],[-80.54275,28.57888],[-80.54953,28.59591],[-80.55331,28.60239],[-80.56069,28.61204],[-80.57528,28.62839],[-80.59193,28.64654],[-80.60438,28.66417],[-80.62223,28.68947],[-80.65193,28.72598],[-80.68643,28.72621]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":40885,"geometry":{"type":"Polygon","coordinates":[[[-87.29419999999999,30.344750000000033],[-87.29866999999996,30.34316000000007],[-87.30288999999999,30.34149000000008],[-87.30756999999994,30.33833000000004],[-87.31066999999996,30.33516000000003],[-87.31181999999995,30.331210000000056],[-87.31199999999995,30.32600000000008],[-87.30999999999995,30.32000000000005],[-87.32499999999999,30.313000000000045],[-87.44299999999998,30.28200000000004],[-87.43599999999998,30.266000000000076],[-87.47599999999994,30.250000000000057],[-87.46699999999998,30.23500000000007],[-87.44999999999999,30.215000000000032],[-87.50099999999998,30.177000000000078],[-87.48599999999999,30.164000000000044],[-87.48199999999997,30.161000000000058],[-87.47799999999995,30.15700000000004],[-87.47499999999997,30.15500000000003],[-87.46899999999994,30.151000000000067],[-87.46099999999996,30.14500000000004],[-87.45399999999995,30.140000000000043],[-87.44299999999998,30.13400000000007],[-87.43399999999997,30.129000000000076],[-87.41899999999998,30.12200000000007],[-87.40799999999996,30.117000000000075],[-87.39499999999998,30.113000000000056],[-87.35799999999995,30.102000000000032],[-87.34199999999998,30.099000000000046],[-87.32799999999997,30.097000000000037],[-87.31499999999994,30.09600000000006],[-87.28199999999998,30.095000000000027],[-87.25499999999994,30.097000000000037],[-87.25099999999998,30.097000000000037],[-87.24999999999994,30.097000000000037],[-87.24899999999997,30.097000000000037],[-87.25999999999999,30.152000000000044],[-87.25199999999995,30.153000000000077],[-87.23899999999998,30.156000000000063],[-87.22199999999998,30.161000000000058],[-87.20799999999997,30.166000000000054],[-87.21199999999999,30.174000000000035],[-87.20299999999997,30.176000000000045],[-87.17999999999995,30.18500000000006],[-87.15199999999999,30.202000000000055],[-87.14999999999998,30.20300000000003],[-87.16599999999994,30.21900000000005],[-87.15899999999993,30.224000000000046],[-87.15799999999996,30.22500000000008],[-87.15699999999998,30.226000000000056],[-87.15199999999999,30.230000000000075],[-87.15199999999999,30.23100000000005],[-87.14499999999998,30.240000000000066],[-87.20099999999996,30.277000000000044],[-87.23599999999999,30.303000000000054],[-87.25299999999999,30.317000000000064],[-87.27038999999996,30.316990000000033],[-87.28811999999994,30.32015000000007],[-87.29052999999999,30.323410000000024],[-87.28999999999996,30.32800000000003],[-87.27099999999996,30.32800000000003],[-87.27084999999994,30.332200000000057],[-87.27221999999995,30.336150000000032],[-87.27530999999999,30.339410000000044],[-87.27816999999999,30.34188000000006],[-87.28264999999999,30.34355000000005],[-87.28824999999995,30.344260000000077],[-87.29419999999999,30.344750000000033]]]},"properties":{"ESRI_OID":40885,"MSI_UID":40885,"ATU":8,"TITLE":"Sector Mobile, Territorial Sea - Sector Mobile, Submerged Land Act (SLA)/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116384736,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:secmobexcecozon:secmobtersea:secmobsublanact","WATERWAY_NAME":"Sector Mobile, Submerged Land Act (SLA)","CREATE_DATE":1775758121000,"MODIFIED_DATE":1775839473000,"BEGIN_DATE":1775692800000,"END_DATE":2091484799000,"DESCRIPTION":"MSIB 32-26 - Potential Unexploded Ordnance (UXO) Hazard\nGulf of America - Fort Pickens, FL --- The U.S. Army Corps of Engineers (USACE) is conducting feasibility studies under the CERCLA process\nto assess hazards associated with historical munitions to include potential unexploded ordnance (UXO) in the vicinity of Fort Pickens, Pensacola, FL.  Due to historical usage of this area, the U.S. Coast Guard advises mariners of potential UXOs located within the Gulf of America and Pensacola Bay, near Santa Rosa Island, Fort Pickens, FL.  UXOs should be considered extremely dangerous.  If touched, moved, or disturbed, these items may detonate, causing severe injury, death, or property damage.  Mariners are strongly urged not to anchor or conduct any bottom-disturbing activities within High Use Areas (HUA) and should exercise caution when conducting activities in the Low Use Areas (LUA). Reference diagrams, provided in the hard copy version of MSIB 32-26, identify Low Use Areas (LUA) in green and High Use Areas (HUA) in orange.  If a mariner encounters a UXO, please contact 911 to report the location that it was found.  Concerned parties may report any hazardous conditions to the U.S. Coast Guard Sector Mobile Command Center at (251) 266-5888.  Additional information is available at: https://www.saj.usace.army.mil/FortPickens/","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-87.2942,30.34475],[-87.29867,30.34316],[-87.30289,30.34149],[-87.30757,30.33833],[-87.31067,30.33516],[-87.31182,30.33121],[-87.312,30.326],[-87.31,30.32],[-87.325,30.313],[-87.443,30.282],[-87.436,30.266],[-87.476,30.25],[-87.467,30.235],[-87.45,30.215],[-87.501,30.177],[-87.486,30.164],[-87.482,30.161],[-87.478,30.157],[-87.475,30.155],[-87.469,30.151],[-87.461,30.145],[-87.454,30.14],[-87.443,30.134],[-87.434,30.129],[-87.419,30.122],[-87.408,30.117],[-87.395,30.113],[-87.358,30.102],[-87.342,30.099],[-87.328,30.097],[-87.315,30.096],[-87.282,30.095],[-87.255,30.097],[-87.251,30.097],[-87.25,30.097],[-87.249,30.097],[-87.26,30.152],[-87.252,30.153],[-87.239,30.156],[-87.222,30.161],[-87.208,30.166],[-87.212,30.174],[-87.203,30.176],[-87.18,30.185],[-87.152,30.202],[-87.15,30.203],[-87.166,30.219],[-87.159,30.224],[-87.158,30.225],[-87.157,30.226],[-87.152,30.23],[-87.152,30.231],[-87.145,30.24],[-87.201,30.277],[-87.236,30.303],[-87.253,30.317],[-87.27039,30.31699],[-87.28812,30.32015],[-87.29053,30.32341],[-87.29,30.328],[-87.271,30.328],[-87.27085,30.3322],[-87.27222,30.33615],[-87.27531,30.33941],[-87.27817,30.34188],[-87.28265,30.34355],[-87.28825,30.34426],[-87.2942,30.34475]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":43101,"geometry":{"type":"Polygon","coordinates":[[[-71.00862999999998,42.40330000000006],[-71.04764999999998,42.38498000000004],[-71.04826999999995,42.36307000000005],[-71.02314999999999,42.34704000000005],[-71.03968999999995,42.29293000000007],[-70.98272999999995,42.25263000000007],[-70.96649999999994,42.24431000000004],[-70.86333999999994,42.27965000000006],[-70.71251999999998,42.19912000000005],[-70.69316999999995,42.198660000000075],[-70.74924999999996,42.25956000000008],[-70.88362999999998,42.38728000000003],[-70.96992999999998,42.375410000000045],[-71.00862999999998,42.40330000000006]]]},"properties":{"ESRI_OID":43101,"MSI_UID":43101,"ATU":1,"TITLE":"Sector Boston, Submerged Land Act (SLA)/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100117657385,"MRN":"urn:mrn:iala:wwy:us:navIV:dis1:secbosexcecozon:secbostersea:secbossublanact","WATERWAY_NAME":"Sector Boston, Submerged Land Act (SLA)","CREATE_DATE":1777997104000,"MODIFIED_DATE":1777997575000,"BEGIN_DATE":1777939200000,"END_DATE":1793577599000,"DESCRIPTION":"General/MSIB\n\nFrom: 2026-05-05 To: 2026-11-01\n\nBoston Harbor Approaches to Approaches to Scituate, Boston Harbor and Weymouth Fore River\nAIS assigned to all Aids to Navigation in the greater Boston marine area from Boston Harbor Approaches to Scituate Approaches landward to Boston Harbor and Weymouth Fore River are non-operational until further notice.\n\n\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-71.00863,42.4033],[-71.04765,42.38498],[-71.04827,42.36307],[-71.02315,42.34704],[-71.03969,42.29293],[-70.98273,42.25263],[-70.9665,42.24431],[-70.86334,42.27965],[-70.71252,42.19912],[-70.69317,42.19866],[-70.74925,42.25956],[-70.88363,42.38728],[-70.96993,42.37541],[-71.00863,42.4033]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":43722,"geometry":{"type":"Polygon","coordinates":[[[-91.17338999999998,25.550370000000044],[-87.87864999999994,25.68237000000005],[-87.82544999999999,28.989000000000033],[-89.07155999999998,30.279780000000073],[-89.49577999999997,30.360130000000026],[-89.62634999999995,31.12886000000003],[-91.56573999999995,31.130420000000072],[-91.92990999999995,31.448230000000024],[-92.77502999999996,30.915350000000046],[-92.78559999999999,26.04078000000004],[-91.17338999999998,25.550370000000044]]]},"properties":{"ESRI_OID":43722,"MSI_UID":43722,"ATU":8,"TITLE":"Sector New Orleans MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1778774364000,"MODIFIED_DATE":1778774530000,"BEGIN_DATE":1778716800000,"END_DATE":1796169599000,"DESCRIPTION":"USACE NAVIGATION BULLETIN 26-45 - SPECIAL NOTICE - HURRICANE SEASON -\nMariners are advised that the Hurricane Season extends from June 1, 2026 to November 30, 2026.  Locks and Navigation Structures operated by the U.S. Army Corps of Engineers will attempt to pass navigation until such time that water levels and wind conditions render operations unsafe.  The structures are then closed in accordance with hurricane procedures.  Mariners will be given as much notice as possible when structures are to be closed; however, these structures may be closed on short notice and well in advance of the actual storm.  Mariners are advised to seek safe harbor as soon as possible.  Mariners using the following structures should consult the respective agency website listed below for structure updates.\n• Southeast Louisiana Flood Protection Authority-East (https://www.floodauthority.org/) operates: GIWW Sector Gate (on the Inner Harbor Navigation Canal Surge Barrier), Bayou Bienvenue Floodgate, Bayou Bienvenue Lift Gate, Seabrook Sector Gate, and Bayou Dupre Floodgate. \n• Southeast Louisiana Flood Protection Authority-West (https://slfpaw.org) operates: Harvey Canal Sector Gate, GIWW West Closure Complex (WCC), and Bayou Segnette Sector Gate. \n• St. Charles Parish Government (https://www.stcharlesparish.gov/departments/emergency-preparedness) operates: Bayou Verret Floodgate (also known as the Sellers Canal Floodgate).\n•Plaquemines Parish Government (https://plaqueminesparish.com/183/Homeland-Security-Emergency-Preparedness) operates: Hero Canal Stoplog Gate, Empire Lock, Ostrica Lock, and Empire Floodgate.\n• Lafourche Parish Government (https://www.lafourchegov.org/emergency-preparedness/) operates: Larose Floodgate and Leon Theriot Lock (Golden Meadow). \n• Terrebonne Parish Government (https://tlcd.org/mobile/) operates: Bubba Dove Floodgate.\nGeneral information for the USACE New Orleans District can be found at:\nhttps://www.mvn.usace.army.mil ","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-91.17339,25.55037],[-87.87865,25.68237],[-87.82545,28.989],[-89.07156,30.27978],[-89.49578,30.36013],[-89.62635,31.12886],[-91.56574,31.13042],[-91.92991,31.44823],[-92.77503,30.91535],[-92.7856,26.04078],[-91.17339,25.55037]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":44455,"geometry":{"type":"Polygon","coordinates":[[[-85.83487999999994,24.716420000000028],[-83.97481999999997,29.36946000000006],[-83.98055999999997,30.286020000000065],[-84.64601999999996,30.34021000000007],[-84.64569999999998,30.738290000000063],[-83.78516999999994,31.839110000000062],[-83.95631999999995,32.393080000000054],[-85.09317999999996,32.93805000000003],[-85.55093999999997,35.06085000000007],[-90.33850999999999,35.08257000000003],[-91.32892999999996,33.71456000000006],[-91.25300999999996,33.09541000000007],[-93.94029999999998,33.10964000000007],[-93.99978999999996,33.650990000000036],[-94.36379999999997,33.638810000000035],[-95.19050999999996,34.048460000000034],[-96.35474999999997,33.79036000000008],[-96.96644999999995,34.045660000000055],[-97.89761999999996,33.975340000000074],[-98.06406999999996,34.23599000000007],[-98.48226999999997,34.15701000000007],[-99.11976999999996,34.29254000000003],[-99.34256999999997,34.546020000000055],[-99.67472999999995,34.47734000000003],[-99.89135999999996,34.606610000000046],[-99.96773999999999,36.58588000000003],[-102.89268999999996,36.59141000000005],[-103.00749999999994,37.090190000000064],[-109.15340999999995,37.03501000000006],[-109.09823999999998,31.266680000000065],[-108.16100999999998,31.263510000000053],[-108.09738999999996,31.694810000000075],[-106.45734999999996,31.659110000000055],[-105.01083999999997,30.553060000000073],[-104.58705999999995,29.572290000000066],[-103.30899999999997,28.891040000000032],[-102.78718999999995,29.16628000000003],[-102.58782999999994,29.677340000000072],[-102.30410999999998,29.785180000000025],[-101.44938999999994,29.683920000000057],[-100.76721999999995,29.05564000000004],[-100.35868999999997,28.20312000000007],[-99.61253999999997,27.52594000000005],[-99.54097999999999,26.993660000000034],[-99.18921999999998,26.367530000000045],[-98.22947999999997,25.967710000000068],[-97.70081999999996,25.94658000000004],[-97.39369999999997,25.748380000000054],[-96.79017999999996,25.918480000000045],[-93.41134999999997,25.919710000000066],[-93.04004999999995,26.13921000000005],[-91.40439999999995,25.63400000000007],[-88.38084999999995,25.60883000000007],[-87.39491999999996,25.911500000000046],[-86.59457999999995,26.401830000000075],[-86.28096999999997,26.218890000000044],[-86.64478999999994,25.171950000000038],[-85.83487999999994,24.716420000000028]]]},"properties":{"ESRI_OID":44455,"MSI_UID":44455,"ATU":8,"TITLE":"DISTRICT 8 - CGD-H MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1779812700000,"MODIFIED_DATE":1779983512000,"BEGIN_DATE":1779753600000,"END_DATE":1796169599000,"DESCRIPTION":"--- U.S. Coast Guard Heartland District Hurricane Season 2026 --- The 2026 Hurricane Season extends from June 1, 2026 through November 30, 2026.  Tropical storms and hurricanes often develop with little warning.  Extensive damage to small craft often results in loss of life.  All mariners, particularly operators of small fishing vessels, are reminded that advanced planning, which may prevent loss of vessel and crew, should include:  \na) Instruction of crew and passengers in location of emergency equipment and emergency procedures.\nb) Pre-sailing check of vessel, machinery, and equipment for seaworthiness.\nc) Installation of strong ground tackle.\nd) Review of storm center evacuation procedures.\ne) Knowledge of the nearest hurricane shelter or port of refuge.\nf) Constant radio watch on VHF-FM Channel 16 and frequent monitoring of VHF-FM Weather Channel for National Weather Service Broadcasts.\n\n\n• AIDS TO NAVIGATION/WRECKS/OBSTRUCTIONS: As a result of tropical storms and hurricanes, aids to navigation along the Gulf Coast and on structures in the Gulf of America and surrounding waters may become damaged or destroyed.  Buoys may move from assigned positions, be damaged, extinguished, sunk, or otherwise made inoperative.  Mariners should not solely rely upon the position or operation of an aid to navigation, but should employ such other available methods of determining positions.  Wrecks, submerged obstructions, and pipelines may move from charted locations or become uncovered due to the force of storm surges.  Storm surges and winds may also create shoals.  The U.S. Aids to Navigation System marking wrecks and obstructions is intended for use with nautical charts.  The exact meaning of a particular aid to navigation may not be clear to the mariner without referencing a nautical chart.  Mariners should exercise caution and report aid to navigation discrepancies and hazards to navigation to the nearest U.S. Coast Guard unit.\n\n• LOCKS/BRIDGES/NAVIGATION STRUCTURES: Drawbridges, locks, and navigation structures along the coast may deviate from normal operating procedures in preparation for heavy weather events.  Some structures may be unable to open because of high winds, high water levels, or to facilitate evacuation of land traffic.  Mariners will be given as much notice as possible when structures are to be closed; however, these structures may close on short notice and well in advance of the storm.  Mariners should anticipate these closures and are urged to seek safe harbor as soon as possible.\n\n• PORTS/WATERWAYS: As tropical weather approaches the Gulf Coast, all potentially affected U.S. Coast Guard Captains of the Port (COTP) will issue a series of Port Conditions to promote the safety of life, the environment, and the viability of the Marine Transportation System.  Port Conditions are issued on a set timeline prior to the arrival of gale force winds associated with a tropical activity and identify the status of the port.  Timelines associated with each port condition are subject to local modifications based upon circumstances, but are most typically issued as follows:\n\n- WHISKEY: 72 hours in advance, OPEN to all commercial traffic. \n- X-RAY: 48 hours in advance, OPEN to all commercial traffic.\n- YANKEE: 24 hours in advance, RESTRICTED with vessel traffic control measures in effect.\n- ZULU: 12 hours in advance, CLOSED to all vessel traffic, except for movements or activities specifically authorized by the COTP.\n\n• Additional requirements or actions to address port-specific safety concerns will be issued by the COTP in conjunction with each Port Condition.  After the passing of a hurricane, local COTPs will issue updates regarding the port status via Broadcast Notice to Mariners and MSIBs.  Mariners are urged to monitor all U.S. Coast Guard and National Weather Service notices and radio traffic closely throughout the Hurricane Season. 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There is potential to contact exposed steel in the area.  All tows transitioning the lock should avoid landing or rubbing on the portion of the I-Wall.  Mariners may contact L/D Nr. 3 via VHF-FM Channel 14, or at (651) 290-5062, for additional information.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-92.6164,44.61147],[-92.61653,44.6113],[-92.60544,44.60906],[-92.60531,44.60928],[-92.6164,44.61147]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":44937,"geometry":{"type":"Polygon","coordinates":[[[-74.51794999999998,31.54863000000006],[-72.06861999999995,33.245310000000075],[-71.20995999999997,35.27845000000008],[-71.38194999999996,36.67435000000006],[-81.68369999999999,36.73986000000008],[-82.15899999999993,36.24482000000006],[-83.98945999999995,35.64322000000004],[-84.50168999999994,35.02840000000003],[-84.31608999999997,34.835320000000024],[-82.39361999999994,35.06048000000004],[-79.76678999999996,34.66326000000004],[-78.64305999999993,33.723610000000065],[-74.51794999999998,31.54863000000006]]]},"properties":{"ESRI_OID":44937,"MSI_UID":44937,"ATU":5,"TITLE":"Sector North Carolina MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1780314519000,"MODIFIED_DATE":1780314564000,"BEGIN_DATE":1780272000000,"END_DATE":1796083199000,"DESCRIPTION":"Sector North Carolina MSI/General/MSIB\n\nFrom: 2026-06-01 To: 2026-11-30\n\nThe Captain of the Port (COTP) North Carolina has set Port Condition Seasonal Alert in preparation for the 2026 hurricane season. Port conditions will be set in the event of forecasted severe weather in accordance with 33 CFR § 165.562.\n\nOperators of self-propelled oceangoing vessels over 500 gross tons (GT), oceangoing tank barges and their supporting tugs, and tank barges over 200 GT must notify Sector North Carolina of any issues preventing or limiting hurricane preparedness and/or their ability to safely depart port as may be directed by the COTP that cannot be mitigated within 72 hours.\n\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-74.51795,31.54863],[-72.06862,33.24531],[-71.20996,35.27845],[-71.38195,36.67435],[-81.6837,36.73986],[-82.159,36.24482],[-83.98946,35.64322],[-84.50169,35.0284],[-84.31609,34.83532],[-82.39362,35.06048],[-79.76679,34.66326],[-78.64306,33.72361],[-74.51795,31.54863]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":44976,"geometry":{"type":"Polygon","coordinates":[[[-76.76260999999994,7.783620000000042],[-76.77582999999998,8.523760000000038],[-76.02298999999994,9.212560000000053],[-75.52467999999999,9.367330000000038],[-75.41403999999994,10.368090000000052],[-75.16385999999994,10.70491000000004],[-74.82561999999996,10.978660000000048],[-74.33551999999997,10.619970000000023],[-74.06376999999998,11.191910000000064],[-73.22485999999998,11.173380000000066],[-71.66092999999995,12.296590000000037],[-71.36469999999997,12.087740000000053],[-72.09167999999994,11.592350000000067],[-71.63505999999995,10.596330000000023],[-70.04673999999994,11.372690000000034],[-68.88534999999996,11.312520000000063],[-68.53120999999999,11.090180000000032],[-68.20702999999997,10.369770000000074],[-66.28261999999995,10.50084000000004],[-65.87382999999994,10.106140000000039],[-65.09552999999994,9.925670000000025],[-63.045529999999985,10.560200000000066],[-62.89754999999997,10.26090000000005],[-63.083699999999965,9.977850000000046],[-62.56525999999997,9.988090000000057],[-62.219569999999976,9.508070000000032],[-62.01189999999997,9.66005000000007],[-61.694079999999985,9.471810000000062],[-61.55370999999997,9.695400000000063],[-60.783529999999985,9.19771000000003],[-56.995289999999954,9.197790000000055],[-47.97649999999993,9.952400000000068],[-42.86325999999997,12.016310000000033],[-50.81239999999997,18.027490000000057],[-58.44563999999997,23.116070000000036],[-64.95750999999996,26.906970000000058],[-78.29987999999997,33.87179000000003],[-79.58916999999997,34.91981000000004],[-82.36809999999997,35.33412000000004],[-85.66703999999999,35.11950000000007],[-85.33578999999997,32.82390000000004],[-84.16443999999996,32.23767000000004],[-84.06936999999994,31.97938000000005],[-84.90660999999994,30.773180000000025],[-84.86831999999998,30.161980000000028],[-84.23151999999999,30.114690000000053],[-84.23065999999994,29.409550000000024],[-87.23481999999996,21.650270000000035],[-86.94645999999995,21.149800000000027],[-87.87205999999998,19.72117000000003],[-87.67284999999998,19.51678000000004],[-87.83825999999999,18.677270000000078],[-88.08793999999995,18.995700000000056],[-88.44778999999994,18.468050000000062],[-88.22827999999998,18.164120000000025],[-88.43626999999998,16.702650000000062],[-89.05945999999994,15.924050000000022],[-88.14177999999998,15.547370000000058],[-87.67835999999994,15.781330000000025],[-86.37943999999999,15.634030000000052],[-85.97089999999997,15.884840000000054],[-84.32827999999995,15.702110000000062],[-84.15961999999996,15.241730000000075],[-83.37411999999995,15.00040000000007],[-83.55596999999995,14.83498000000003],[-83.34137999999996,14.325990000000047],[-83.63009999999997,13.752210000000048],[-84.00290999999999,11.274920000000066],[-83.52078999999998,10.316080000000056],[-82.48419999999999,9.334020000000066],[-82.34003999999999,8.907280000000071],[-81.12964999999997,8.653890000000047],[-79.59680999999995,9.455940000000055],[-78.98717999999997,9.409460000000024],[-78.10951999999997,9.111050000000034],[-76.76260999999994,7.783620000000042]]]},"properties":{"ESRI_OID":44976,"MSI_UID":44976,"ATU":7,"TITLE":"DISTRICT 7 - CGD-SE MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1780322383000,"MODIFIED_DATE":1780322782000,"BEGIN_DATE":1780272000000,"END_DATE":1796083199000,"DESCRIPTION":"DISTRICT 7 - CGD-SE MSI/General/MSIB\n\nFrom: 2026-06-01 To: 2026-11-28\n44976\n\nHURRICANE INFORMATION:\n\nThe hurricane season extends from June 1st through November 30th. Hurricanes can cause excessive damage to vessels and loss of life. To minimize these dangers, the following precautions should be taken by all mariners before getting underway during the hurricane season:\n(a) Instruction of crew and passengers in location of emergency equipment and emergency procedures;\n(b) Pre-sailing check of vessel, machinery, and equipment for seaworthiness;\n(c) Installation of strong ground tackle;\n(d) Review of storm center evasion procedures;\n(e) Knowledge of nearest hurricane shelter or port; and\n(f) Constant radio watches on channel 16 VHF-FM and frequent monitoring of weather broadcasts.\n\nThe civilian hurricane warning service for the North Atlantic is provided by the National Hurricane Center, Miami, Florida. The center collates ship, aircraft, radar, and satellite data to produce and issue tropical cyclone warnings and forecasts for the North Atlantic Ocean, including the Caribbean Sea and the Gulf of Mexico. A Tropical Cyclone Public Advisory (TCP) is issued every six hours, with intermediate bulletins provided as needed.  For tropical storms and hurricanes threatening to cross the coast of the U.S., coastal warnings are issued to the public so that precautionary actions, including evacuation, can be initiated to minimize damage and loss of life.\n\nFour alerts are issued:\n(a)\tTROPICAL STORM WATCH – An announcement that sustained winds of 34 to 63 knots (39 to 73 mph or 63 to 118 km/hr) are possible within the specified area within 48 hours in association with a tropical, subtropical, or post-tropical cyclone.\n\n(b)\tTROPICAL STORM WARNING – An announcement that sustained winds of 34 to 63 knots (39 to 73 mph or 63 to 118 km/hr) are expected somewhere within the specified area within 36 hours in association with a tropical, subtropical, or post-tropical cyclone.\n\n(c)\tHURRICANE WATCH – An announcement that sustained winds of 64 knots (74 mph or 119 km/hr) or higher are possible within the specified area in association with a tropical, subtropical, or post-tropical cyclone. Because hurricane preparedness activities become difficult once winds reach tropical storm force, the hurricane watch is issued 48 hours in advance of the anticipated onset of tropical storm force winds.\n\n(d)\tHURRICANE WARNING – An announcement that sustained winds of 64 knots (74 mph or 119 km/hr) or higher are expected somewhere within the specified area in association with a tropical, subtropical, or post-tropical cyclone. Because hurricane preparedness activities become difficult once winds reach tropical storm force, the warning is issued 36 hours in advance of the anticipated onset of tropical-storm-force winds. The warning can remain in effect when dangerously high water or a combination of dangerously high water and waves continue, even though winds may be less than hurricane force.\n\nAdditional information of interest to mariners is included in the Tropical Cyclone Forecast/Advisory (TCM) and the Tropical Cyclone Surface Wind Speed Probabilities (PWS) products. The TCM provides current and forecast storm positions, intensities, and wind fields out to 120 hours. The PWS provides probabilities of sustained wind speeds equal to or exceeding 34-, 50-, and 64-kt wind speed thresholds for select coastal and offshore 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7 - CGD-SE MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1780322457000,"MODIFIED_DATE":1780322657000,"BEGIN_DATE":1780272000000,"END_DATE":1796083199000,"DESCRIPTION":"DISTRICT 7 - CGD-SE MSI/General/MSIB\n\nFrom: 2026-06-01 To: 2026-11-30\n44978\nHURRICANE INFORMATION CONTINUED:\n\nMariners are reminded that aids to navigation, particularly lighted and unlighted buoys, may be moved from charted position, damaged, destroyed, extinguished, or otherwise deemed discrepant as a result of hurricanes and storms. Mariners should not rely solely upon the position or operation of an aid to navigation, but also employ such other methods of determining position as may be available. Port Hurricane Conditions are set up by the COTP and will change as the threat of severe weather increases, or as a storm approaches a specific COTP Area of Responsibility. For COTP-specific Port Hurricane Conditions, you should review information provided under the Port Directory tab of http://homeport.uscg.mil\n\nCondition 4 – Hurricane Seasonal Alert.  01 June–30 November; port status:  open.\nCondition Whiskey – Sustained Gale Force winds associated with Tropical Cyclone activity are predicted within 72 hours; port status:  open.\nCondition X-Ray – Sustained Gale Force winds associated with Tropical Cyclone activity are predicted within 48 hours; port status:  open.\nCondition Yankee – Sustained Gale Force winds associated with Tropical Cyclone activity are predicted within 24 hours; port status:  restricted; vessel/facility control measures in effect.\nCondition Zulu – Sustained Gale Force winds associated with Tropical Cyclone activity are predicted within 12 hours; port status:  closed to all vessel traffic and waterside activities except for activities approved by the COTP.\n\nDrawbridges along the coast may deviate from normal operating procedures. Drawbridges are authorized to remain closed upon approach of Gale Force winds of 34 knots or greater.  Extended closure periods may be authorized up to 8 hours prior to arrival of Gale Force winds to facilitate evacuation of land traffic.  Due to the uncertainty of hurricane movements and bridge closures, mariners are urged to seek passage through drawbridges well in advance of the arrival of Gale Force winds.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-76.76261,7.78362],[-76.77583,8.52376],[-76.02299,9.21256],[-75.52468,9.36733],[-75.41404,10.36809],[-75.16386,10.70491],[-74.82562,10.97866],[-74.33552,10.61997],[-74.06377,11.19191],[-73.22486,11.17338],[-71.66093,12.29659],[-71.3647,12.08774],[-72.09168,11.59235],[-71.63506,10.59633],[-70.04674,11.37269],[-68.88535,11.31252],[-68.53121,11.09018],[-68.20703,10.36977],[-66.28262,10.50084],[-65.87383,10.10614],[-65.09553,9.92567],[-63.04553,10.5602],[-62.89755,10.2609],[-63.0837,9.97785],[-62.56526,9.98809],[-62.21957,9.50807],[-62.0119,9.66005],[-61.69408,9.47181],[-61.55371,9.6954],[-60.78353,9.19771],[-56.99529,9.19779],[-47.9765,9.9524],[-42.86326,12.01631],[-50.8124,18.02749],[-58.44564,23.11607],[-64.95751,26.90697],[-78.29988,33.87179],[-79.58917,34.91981],[-82.3681,35.33412],[-85.66704,35.1195],[-85.33579,32.8239],[-84.16444,32.23767],[-84.06937,31.97938],[-84.90661,30.77318],[-84.86832,30.16198],[-84.23152,30.11469],[-84.23066,29.40955],[-87.23482,21.65027],[-86.94646,21.1498],[-87.87206,19.72117],[-87.67285,19.51678],[-87.83826,18.67727],[-88.08794,18.9957],[-88.44779,18.46805],[-88.22828,18.16412],[-88.43627,16.70265],[-89.05946,15.92405],[-88.14178,15.54737],[-87.67836,15.78133],[-86.37944,15.63403],[-85.9709,15.88484],[-84.32828,15.70211],[-84.15962,15.24173],[-83.37412,15.0004],[-83.55597,14.83498],[-83.34138,14.32599],[-83.6301,13.75221],[-84.00291,11.27492],[-83.52079,10.31608],[-82.4842,9.33402],[-82.34004,8.90728],[-81.12965,8.65389],[-79.59681,9.45594],[-78.98718,9.40946],[-78.10952,9.11105],[-76.76261,7.78362]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":47766,"geometry":{"type":"Polygon","coordinates":[[[-93.81616999999994,25.84740000000005],[-92.45428999999996,26.012770000000046],[-92.55803999999995,30.03099000000003],[-92.43273999999997,30.811230000000023],[-92.04607999999996,31.14513000000005],[-93.34259999999995,32.35293000000007],[-93.86443999999995,32.361380000000054],[-93.90933999999999,33.658990000000074],[-95.20280999999994,34.11257000000006],[-96.24956999999995,33.87268000000006],[-96.57747999999998,34.34779000000003],[-96.78994999999998,34.10394000000008],[-97.84844999999996,34.04015000000004],[-98.05116999999996,34.29884000000004],[-99.62244999999996,34.52366000000006],[-99.81613999999996,34.637410000000045],[-99.93448999999998,36.64235000000008],[-103.16473999999994,36.597290000000044],[-103.20344999999998,31.99765000000008],[-102.46493999999996,31.933130000000062],[-102.33506999999997,31.50595000000004],[-100.87049999999999,31.387360000000058],[-100.73796999999996,30.93921000000006],[-98.14528999999999,30.889680000000055],[-98.15949999999998,30.502480000000048],[-97.09007999999994,29.89462000000003],[-96.70451999999995,29.966060000000027],[-96.12863999999996,28.515930000000026],[-93.81616999999994,25.84740000000005]]]},"properties":{"ESRI_OID":47766,"MSI_UID":47766,"ATU":8,"TITLE":"Sector Houston - Galveston MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1783003257000,"MODIFIED_DATE":1783003933000,"BEGIN_DATE":1782950400000,"END_DATE":1793577599000,"DESCRIPTION":"-- MSIB 26-08 Menhaden Season -- This annual MSIB is issued to provide awareness for the Gulf Menhaden seasonal event.  Throughout the Houston Ship Channel, Menhaden have been known to accumulate in sea strainers and cause loss or reduction in propulsion, reduced maneuverability, and loss of water pressure within the firefighting systems.  This is typically a seasonal event primarily occurring in the months of March thru October (although vessels have reported Menhaden impacts year-round).  Menhaden are typically found in coastal and inland tidal waters, and can form large surface schools, appearing in near-shore Gulf waters.  Schools of fish can be drawn into the vessel’s sea chest, clogging the sea strainers, reducing cooling, and causing high water/oil temperatures.  In extreme cases, intake of these fish have choked entire coolant systems resulting in engine auto slowdowns or automatic shutdowns.  Any system that takes suction from the sea could be at risk.  The Lone Star Harbor Safety Committee’s Causality Analysis Workgroup (CAWG) developed Recommended Best Practices and a “Vessel Questionnaire on Cooling Water Impacts by Menhaden Fish\".  All deep draft vessels operators are encouraged to follow the Recommended Best Practices and are asked to complete and submit the questionnaire to info@theagcteam.com.  The CAWG will coordinate with Texas Parks and Wildlife to identify peak periods of projected activity in the Houston Ship Channel and will make this data available to the vessel via the vessel agent.  Workgroups will also be coordinating with Texas A&M University to identify environmental factors.  The data collected will assist the CAWG with its continued analysis of the patterns of the Menhaden and the development of additional best practices.  To obtain a copy of the Best Practices and questionnaire, mariners should contact U.S. Coast Guard Sector Houston-Galveston at:  houstonwwm@uscg.mil or (713) 398-5823","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-93.81617,25.8474],[-92.45429,26.01277],[-92.55804,30.03099],[-92.43274,30.81123],[-92.04608,31.14513],[-93.3426,32.35293],[-93.86444,32.36138],[-93.90934,33.65899],[-95.20281,34.11257],[-96.24957,33.87268],[-96.57748,34.34779],[-96.78995,34.10394],[-97.84845,34.04015],[-98.05117,34.29884],[-99.62245,34.52366],[-99.81614,34.63741],[-99.93449,36.64235],[-103.16474,36.59729],[-103.20345,31.99765],[-102.46494,31.93313],[-102.33507,31.50595],[-100.8705,31.38736],[-100.73797,30.93921],[-98.14529,30.88968],[-98.1595,30.50248],[-97.09008,29.89462],[-96.70452,29.96606],[-96.12864,28.51593],[-93.81617,25.8474]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":48512,"geometry":{"type":"Polygon","coordinates":[[[-93.30014999999997,30.094170000000076],[-93.30182999999994,30.092800000000068],[-93.29173999999995,30.086150000000032],[-93.28388999999999,30.08021000000008],[-93.27667999999994,30.07475000000005],[-93.26255999999995,30.05592000000007],[-93.26255999999995,30.054400000000044],[-93.26504999999997,30.048560000000066],[-93.26512999999994,30.047520000000077],[-93.26143999999994,30.040470000000028],[-93.25830999999994,30.036380000000065],[-93.24822999999998,30.030580000000043],[-93.23521999999997,30.024600000000078],[-93.23225999999994,30.022000000000048],[-93.23045999999994,30.019070000000056],[-93.22745999999995,30.003420000000062],[-93.22599999999994,30.000150000000076],[-93.21667999999994,29.99171000000007],[-93.21560999999997,29.993010000000027],[-93.22315999999995,29.999780000000044],[-93.22530999999998,30.00242000000003],[-93.22736999999995,30.010000000000048],[-93.22920999999997,30.020480000000077],[-93.23165999999998,30.023900000000026],[-93.24122999999997,30.029130000000066],[-93.25680999999997,30.037490000000048],[-93.25890999999996,30.040730000000053],[-93.26272999999998,30.047040000000038],[-93.26289999999995,30.048680000000047],[-93.26096999999999,30.05161000000004],[-93.26019999999994,30.054400000000044],[-93.26096999999999,30.056700000000035],[-93.27195999999998,30.073010000000068],[-93.27611999999999,30.07806000000005],[-93.28542999999996,30.083330000000046],[-93.28817999999995,30.084850000000074],[-93.29607999999996,30.090270000000032],[-93.30014999999997,30.094170000000076]]]},"properties":{"ESRI_OID":48512,"MSI_UID":48512,"ATU":8,"TITLE":"New Orleans Port Arthur/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100118285173,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:secneworlexcecozon:sechouexcecozon:secneworltersea:sechoutersea:secneworlsublanact:sechousublanact:neworl","WATERWAY_NAME":"New Orleans Port Arthur","CREATE_DATE":1783691265000,"MODIFIED_DATE":1785337568000,"BEGIN_DATE":1783641600000,"END_DATE":1798761599000,"DESCRIPTION":"--- MSIB 19-26: Calcasieu Lock GIWW Navigational Considerations --- Due to a collision with the Black Bayou Bridge causing significant structural damage, and several documented near-miss situations at the Grand Lake Bridge investigated by MSU Lake Charles, this Marine Safety Information Bulletin (MSIB) brings heightened awareness to all commercial vessels with anticipated voyages in the GIWW east of the Calcasieu Locks, specifically between Miles 229.0 and 239.0, WHL.  Mariners are advised that this waterway features a narrow channel, two swing bridges, and the Calcasieu Lock, which is currently undergoing maintenance and is closed to marine traffic from 7:00 a.m. to 7:00 p.m., Monday through Friday, through September 2026.  These characteristics may present navigational challenges for transiting vessels and tows. Furthermore, mariners are advised that contact with the fendering systems of the Grand Lake Bridge should be avoided at all costs.  Damage to these fenders could result in enforcement action by U.S. Coast Guard MSU Lake Charles.  For all commercial vessels transiting this area, consideration should be given to voyage planning, navigational assessments, posting suitable lookouts, and maintaining a safe speed to allow for timely and effective maneuvers.  These considerations are not exhaustive and do not supersede navigation rules, sound mariner judgment, or good seamanship.  Compliance with a vessel’s Towing Safety Management System (TSMS), where applicable, remains essential.  All commercial vessel operators are strongly encouraged to share this MSIB with their vessel crews during voyage planning for transits through this area.  For questions about this MSIB, mariners can contact the U.S. Coast Guard MSU Lake Charles Waterways Department at: msulcwwm@uscg.mil.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-93.30015,30.09417],[-93.30183,30.0928],[-93.29174,30.08615],[-93.28389,30.08021],[-93.27668,30.07475],[-93.26256,30.05592],[-93.26256,30.0544],[-93.26505,30.04856],[-93.26513,30.04752],[-93.26144,30.04047],[-93.25831,30.03638],[-93.24823,30.03058],[-93.23522,30.0246],[-93.23226,30.022],[-93.23046,30.01907],[-93.22746,30.00342],[-93.226,30.00015],[-93.21668,29.99171],[-93.21561,29.99301],[-93.22316,29.99978],[-93.22531,30.00242],[-93.22737,30.01],[-93.22921,30.02048],[-93.23166,30.0239],[-93.24123,30.02913],[-93.25681,30.03749],[-93.25891,30.04073],[-93.26273,30.04704],[-93.2629,30.04868],[-93.26097,30.05161],[-93.2602,30.0544],[-93.26097,30.0567],[-93.27196,30.07301],[-93.27612,30.07806],[-93.28543,30.08333],[-93.28818,30.08485],[-93.29608,30.09027],[-93.30015,30.09417]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":48533,"geometry":{"type":"Polygon","coordinates":[[[-82.62866999999994,45.35537000000005],[-83.45172999999994,45.322550000000035],[-83.35925999999995,45.17559000000006],[-83.28143999999998,45.05610000000007],[-82.58471999999995,45.07030000000003],[-82.62866999999994,45.35537000000005]]]},"properties":{"ESRI_OID":48533,"MSI_UID":48533,"ATU":9,"TITLE":"PORT HURON TO PTE AUX BARQUES - LAKE HURON/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100117873287,"MRN":"urn:mrn:iala:wwy:us:navIV:dis9:stlawsea:lakont:lowniariv:niariv:lakeri:wesendoflakeri:detriv:lakstcla:stclariv:lakhur","WATERWAY_NAME":"LAKE HURON","CREATE_DATE":1783700390000,"MODIFIED_DATE":1783700398000,"BEGIN_DATE":1785542400000,"END_DATE":1786838399000,"DESCRIPTION":"General/MSIB\n\nFrom: 2026-08-01 To: 2026-08-15\n\nMilitary Exercise Northern Strike will be occurring 3-14 Aug 2026 and will include portions of Lake Huron from approximately 45-45'N south to approximately 43-30'S.  During this time, mariners may witness low flying aircraft, interaction between exercise surface vessels and aircraft and the presence of Unmanned Surface Vessels (USVs).  USVs will have a support vessel with them in the vicinity.  Specific date of note: Friday 7 Aug from 1530-1730L will include an air-to-surface live fire exercise utilizing crew served weapons in the vicinity of 45-14'N 082-48'W\"\n\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-82.62867,45.35537],[-83.45173,45.32255],[-83.35926,45.17559],[-83.28144,45.0561],[-82.58472,45.0703],[-82.62867,45.35537]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":48987,"geometry":{"type":"Polygon","coordinates":[[[-95.70736999999997,36.20425000000006],[-95.70780999999994,36.203940000000046],[-95.70712999999995,36.20338000000004],[-95.70673999999997,36.20374000000004],[-95.70736999999997,36.20425000000006]]]},"properties":{"ESRI_OID":48987,"MSI_UID":48987,"ATU":2,"TITLE":"Arkansas River - Verdigris River/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116381228,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:secneworlexcecozon:secneworltersea:secneworlsublanact:soupas:heaofpastoneworl:neworlhar:neworltobatrou:lowmisriv:whiriv:arkposcan:arkriv:verriv","WATERWAY_NAME":"Verdigris River","CREATE_DATE":1784291282000,"MODIFIED_DATE":1784291745000,"BEGIN_DATE":1784246400000,"END_DATE":1786751999000,"DESCRIPTION":"Commencing August 10, 2026, and continuing through August 13, 2026, dive operations will take place underneath the I-44 Highway Bridge, in the vicinity of Mile 443.2.  Work will be conducted from 8:00 a.m. until 5:00 p.m., each day.  Mariners may contact Mr. Buck Ray via VHF-FM Channel 16, or at (405) 465-7245, for up-to-date information.  Questions or requests for additional information concerning this notice should be directed to USACE Tulsa District Mr. Kenneth Todd; Deputy Navigation Project Manager: (918) 543-2216 Ext 2, or Mr. Brad Johnson; Lock Operator Supervisor: (918) 687-4501. 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Therefore, mariners are to use extreme caution in the vicinity and avoid contact with the Northeast Longwall Dolphin.  POC: (337) 477-1482 or (504) 862-2060\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-93.30015,30.09417],[-93.30183,30.0928],[-93.29174,30.08615],[-93.28869,30.0844],[-93.28818,30.08485],[-93.29608,30.09027],[-93.30015,30.09417]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":49727,"geometry":{"type":"Polygon","coordinates":[[[-87.38004999999998,37.93541000000005],[-87.38049999999998,37.93488000000008],[-87.36729999999994,37.929050000000075],[-87.36693999999994,37.92955000000006],[-87.38004999999998,37.93541000000005]]]},"properties":{"ESRI_OID":49727,"MSI_UID":49727,"ATU":2,"TITLE":"Lower Mississippi River - Ohio River/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116381306,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:secneworlexcecozon:secneworltersea:secneworlsublanact:soupas:heaofpastoneworl:neworlhar:neworltobatrou:lowmisriv:ohiriv","WATERWAY_NAME":"Ohio River","CREATE_DATE":1785155438000,"MODIFIED_DATE":1785156025000,"BEGIN_DATE":1785110400000,"END_DATE":1787011199000,"DESCRIPTION":"U.S. Coast Guard COTP Ohio Valley has issued a Safety Advisory due to high water conditions at Newburgh L/D, in the vicinity of Mile 776.1.  Mariners are advised to exercise caution due to the hazardous conditions associated with strong currents, increased drift, increased drafting toward bridge piers and severe outdrafts.  Mariners are advised to consider horsepower capability and tow size.  Fleet operators should regularly check their fleets and immediately report barge breakaways to the U.S. Coast Guard. 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Lower Mississippi River (LMR) users should prepare for extreme low water conditions.  The following low water safety precautions are in effect for 81 Mile Point, from Mile 177.0 to Mile 179.0, AHOP, when the Baton Rouge River gauge reads 16 ft and below and the Carrollton gauge reads 2.5 ft and below:\n•  In accordance with 33 CFR 161.65(e), all vessels moving or intending to move into 81 Mile Point (Miles 177.0 - 179.0) must complete the appropriate check-in procedures with the U.S. Coast Guard VTS LMR prior to transiting.\n•  Mariners are also advised of the increased possibility of shoaling in this area and should use extreme caution while transiting.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-91.02508,30.13259],[-91.03281,30.12745],[-91.03553,30.12482],[-91.03594,30.12159],[-91.0347,30.1181],[-91.03219,30.11502],[-91.02892,30.11314],[-91.02071,30.11114],[-91.01296,30.11051],[-91.01247,30.11816],[-91.01781,30.11804],[-91.02455,30.11756],[-91.0247,30.1183],[-91.02751,30.12068],[-91.02611,30.12285],[-91.02019,30.12636],[-91.02508,30.13259]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":50342,"geometry":{"type":"Polygon","coordinates":[[[-91.20215999999994,30.42924000000005],[-91.20393999999999,30.422150000000045],[-91.20788999999996,30.41250000000008],[-91.21161999999998,30.406610000000057],[-91.21599999999995,30.40061000000003],[-91.22033999999996,30.395840000000078],[-91.22488999999996,30.391470000000027],[-91.23131999999998,30.38418000000007],[-91.22286999999994,30.381590000000074],[-91.20844999999997,30.39510000000007],[-91.19981999999999,30.407830000000047],[-91.19644999999997,30.418120000000044],[-91.19419999999997,30.42856000000006],[-91.20215999999994,30.42924000000005]]]},"properties":{"ESRI_OID":50342,"MSI_UID":50342,"ATU":8,"TITLE":"New Orleans Harbor - New Orleans To Baton Rouge/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100119138784,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:secneworlexcecozon:secneworltersea:secneworlsublanact:soupas:heaofpastoneworl:neworlhar:neworltobatrou","WATERWAY_NAME":"New Orleans To Baton Rouge","CREATE_DATE":1785767272000,"MODIFIED_DATE":1786372309000,"BEGIN_DATE":1785715200000,"END_DATE":1793491199000,"DESCRIPTION":"MSIB Vol XXVI Issue 027 - Mississippi River - Low Water Safety Advisory --- The National Weather Service forecasts low river stages.  Lower Mississippi River (LMR) users should prepare for extreme low water conditions.  The following low water safety precautions are in effect for all waters of the LMR  at College Town Light, from Mile 225.0 to Mile 228.3, AHOP:\n• All towing vessels are advised to keep flat on the bank and provide a wide berth to deep-draft vessel traffic.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-91.20216,30.42924],[-91.20394,30.42215],[-91.20789,30.4125],[-91.21162,30.40661],[-91.216,30.40061],[-91.22034,30.39584],[-91.22489,30.39147],[-91.23132,30.38418],[-91.22287,30.38159],[-91.20845,30.3951],[-91.19982,30.40783],[-91.19645,30.41812],[-91.1942,30.42856],[-91.20216,30.42924]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":50371,"geometry":{"type":"Polygon","coordinates":[[[-91.66535999999996,30.822020000000066],[-90.92108999999994,30.904400000000066],[-90.95128999999997,31.45583000000005],[-90.57523999999995,31.548590000000047],[-90.52711999999997,32.28364000000005],[-89.58138999999994,33.152750000000026],[-89.69187999999997,33.36127000000005],[-90.55985999999996,33.41213000000005],[-90.49525999999997,33.83173000000005],[-90.07069999999999,34.58309000000003],[-89.55869999999999,34.70333000000005],[-88.72635999999994,36.63239000000004],[-94.42827999999997,36.655610000000024],[-94.60706999999996,37.15253000000007],[-103.17773999999997,37.05693000000008],[-103.04779999999994,36.34563000000003],[-100.19300999999996,36.34767000000005],[-100.08464999999995,34.421370000000024],[-97.16292999999996,33.56669000000005],[-96.88890999999995,33.80666000000008],[-96.36116999999996,33.53386000000006],[-95.23438999999996,33.79896000000008],[-94.25397999999996,33.479580000000055],[-94.18480999999997,32.10084000000006],[-93.52858999999995,32.075500000000034],[-92.33849999999995,30.99216000000007],[-91.95805999999999,31.08426000000003],[-91.66535999999996,30.822020000000066]]]},"properties":{"ESRI_OID":50371,"MSI_UID":50371,"ATU":2,"TITLE":"Sector Lower Mississippi River MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1785773881000,"MODIFIED_DATE":1785781873000,"BEGIN_DATE":1785715200000,"END_DATE":1798761599000,"DESCRIPTION":"The U.S. Coast Guard COTP Lower Mississippi River has issued a low water Safety Advisory between approximate Miles 869.0 and 303.0.  The Memphis, TN gauge is at 0.0 feet and holding.  The USACE maintained depths and widths, may not be attainable on all buoy lines.  It is recommended that mariners monitor all gauge readings, for safe navigation.  The U.S. Coast Guard COTP Lower Mississippi River, with the concurrence of the Lower Mississippi River Committee, has not imposed any draft or tow restrictions currently.  U.S. Coast Guard Sector Lower Mississippi River reminds all owners, operators and credentialed mariners to review 33 CFR 164.78 and 46 CFR Part 15, which requires mariners to understand the factors affecting towing vessel maneuverability and operator responsibilities.  Officers in charge of the watch shall conduct navigational assessments per 46 CFR 140.635 and maintain situational awareness through proactive planning, risk mitigation, and diligent navigation, which includes due regard for current and forecasted river stages.  Mariners who identify missing or off-station ATON, shoaling, groundings, or hazardous trouble spots shall immediately contact the U.S. Coast Guard Western Rivers Command Center via VHF-FM Channel 16, or at (866) 360-3386.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-91.66536,30.82202],[-90.92109,30.9044],[-90.95129,31.45583],[-90.57524,31.54859],[-90.52712,32.28364],[-89.58139,33.15275],[-89.69188,33.36127],[-90.55986,33.41213],[-90.49526,33.83173],[-90.0707,34.58309],[-89.5587,34.70333],[-88.72636,36.63239],[-94.42828,36.65561],[-94.60707,37.15253],[-103.17774,37.05693],[-103.0478,36.34563],[-100.19301,36.34767],[-100.08465,34.42137],[-97.16293,33.56669],[-96.88891,33.80666],[-96.36117,33.53386],[-95.23439,33.79896],[-94.25398,33.47958],[-94.18481,32.10084],[-93.52859,32.0755],[-92.3385,30.99216],[-91.95806,31.08426],[-91.66536,30.82202]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":50372,"geometry":{"type":"Polygon","coordinates":[[[-88.35826999999995,48.29493000000008],[-88.67137999999994,48.237640000000056],[-89.32872999999995,47.968630000000076],[-89.47703999999999,48.006620000000055],[-92.08628999999996,46.78205000000003],[-92.02403999999996,46.73061000000007],[-89.51365999999996,47.924480000000074],[-89.37632999999994,47.88029000000006],[-88.63475999999997,48.16808000000003],[-88.36375999999996,48.218120000000056],[-84.96996999999999,46.80437000000006],[-84.86376999999999,46.598430000000064],[-84.66234999999995,46.472470000000044],[-84.61283999999995,46.504860000000065],[-84.76756999999998,46.63012000000003],[-84.86460999999997,46.88602000000003],[-88.35826999999995,48.29493000000008]]]},"properties":{"ESRI_OID":50372,"MSI_UID":50372,"ATU":9,"TITLE":"Lake Superior/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116386336,"MRN":"urn:mrn:iala:wwy:us:navIV:dis9:stlawsea:lakont:lowniariv:niariv:lakeri:wesendoflakeri:detriv:lakstcla:stclariv:lakhur:saimarriv:laksup","WATERWAY_NAME":"Lake Superior","CREATE_DATE":1785774483000,"MODIFIED_DATE":1785774647000,"BEGIN_DATE":1777420800000,"END_DATE":1792972799000,"DESCRIPTION":"General/MSIB\n\nFrom: 2026-04-29 To: 2026-11-16\n\nSAILDRONE, INC. is conducting operations with two Uncrewed Surface Vehicles (USVs), called “SAILDRONE Voyager.” The SAILDRONE Voyager is 10 meters in length, 6.4 meters tall, gray and orange in color, has a tricolor light on top of the wing and is marked \"SAILDRONE\". The vehicles will be operating throughout Lake Superior and IVO of Isle Royale.  Mariners are requested to remain greater than 500 meters away from the vehicle. Questions regarding this notice can be directed to Saildrone Mission Control at missioncontrol@saildrone.com or via phone at +1-510-722-6070.\n\n\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-88.35827,48.29493],[-88.67138,48.23764],[-89.32873,47.96863],[-89.47704,48.00662],[-92.08629,46.78205],[-92.02404,46.73061],[-89.51366,47.92448],[-89.37633,47.88029],[-88.63476,48.16808],[-88.36376,48.21812],[-84.96997,46.80437],[-84.86377,46.59843],[-84.66235,46.47247],[-84.61284,46.50486],[-84.76757,46.63012],[-84.86461,46.88602],[-88.35827,48.29493]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":50373,"geometry":{"type":"Polygon","coordinates":[[[-78.90040999999997,42.84997000000004],[-80.11988999999994,42.37834000000004],[-81.24232999999998,42.203610000000026],[-82.39039999999994,41.67241000000007],[-82.67604999999998,41.66967000000005],[-83.06422999999995,41.86633000000006],[-83.13929999999993,42.01751000000007],[-83.20704999999998,41.99846000000008],[-83.11915999999997,41.84042000000005],[-82.85365999999993,41.61494000000005],[-82.66139999999996,41.56016000000005],[-82.36293999999998,41.571120000000064],[-81.19471999999996,42.09501000000006],[-80.06495999999999,42.299840000000074],[-79.30689999999998,42.59573000000006],[-78.86378999999994,42.80297000000007],[-78.90040999999997,42.84997000000004]]]},"properties":{"ESRI_OID":50373,"MSI_UID":50373,"ATU":9,"TITLE":"Niagara River - Lake Erie/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100117076333,"MRN":"urn:mrn:iala:wwy:us:navIV:dis9:stlawsea:lakont:lowniariv:niariv:lakeri","WATERWAY_NAME":"Lake Erie","CREATE_DATE":1785774531000,"MODIFIED_DATE":1785774653000,"BEGIN_DATE":1776729600000,"END_DATE":1794787199000,"DESCRIPTION":"General/MSIB\n\nFrom: 2026-04-21 To: 2026-11-15\n\nSAILDRONE, INC. is conducting operations with up to four Uncrewed Surface Vehicles (USVs), called “SAILDRONE Voyager.” The SAILDRONE Voyager is 10 meters in length, 6.4 meters tall, gray and orange in color, has a tricolor light on top of the wing and is marked \"SAILDRONE\". The vehicles may be operating as far west as Sandusky Bay Western Basin and as far east as Lake Erie Eastern Basin.  Mariners are requested to remain greater than 500 meters away from the vehicle. Questions regarding this notice can be directed to Saildrone Mission Control at missioncontrol@saildrone.com or via phone at +1-510-722-6070\n\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-78.90041,42.84997],[-80.11989,42.37834],[-81.24233,42.20361],[-82.3904,41.67241],[-82.67605,41.66967],[-83.06423,41.86633],[-83.1393,42.01751],[-83.20705,41.99846],[-83.11916,41.84042],[-82.85366,41.61494],[-82.6614,41.56016],[-82.36294,41.57112],[-81.19472,42.09501],[-80.06496,42.29984],[-79.3069,42.59573],[-78.86379,42.80297],[-78.90041,42.84997]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":50374,"geometry":{"type":"Polygon","coordinates":[[[-83.41529999999995,43.973880000000065],[-83.54212999999999,43.71935000000008],[-83.48903999999999,43.689230000000066],[-83.26317999999998,43.973880000000065],[-83.41529999999995,43.973880000000065]]]},"properties":{"ESRI_OID":50374,"MSI_UID":50374,"ATU":9,"TITLE":"LAKE HURON - SAGINAW BAY/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116386126,"MRN":"urn:mrn:iala:wwy:us:navIV:dis9:stlawsea:lakont:lowniariv:niariv:lakeri:wesendoflakeri:detriv:lakstcla:stclariv:lakhur:sagbay","WATERWAY_NAME":"SAGINAW BAY","CREATE_DATE":1785774560000,"MODIFIED_DATE":1785774660000,"BEGIN_DATE":1784851200000,"END_DATE":1788825599000,"DESCRIPTION":"General/MSIB\n\nFrom: 2026-07-24 To: 2026-09-07\n\nThe NOAA Great Lakes Environmental Research Laboratory (GLERL) will be conducting multiple scientific instrumentation deployments, including some Autonomous Surface Vessel (ASV) deployments between July 29 and September 4, 2026,  The vessel will be on the water three days or less per week during that time period responding to weather driven events (heat waves, high precipitation, etc.). The ASV is a 16-foot single hull SeaTrac that operates on the water surface a white flashing light running at all times. Mariners are asked to keep a minimum distance of 200 feet away from the ASV. The vessel will be clearly marked with the word “SeaTrac” and the NOAA logo and will display navigation lights for a powered vessel of its size. The vessel will carry AIS and broadcast its position under the name “UNCREWED NOAA SP48” with an MMSI number of 338555458. The R4107, R4108, or the R2604 may be on scene during some operations and may be hailed on VHF-FM channel 16. For additional information, contact NOAA GLERL Marine Instrumentation Laboratory at 734-741-2235 or email oar.glerl.mil-team@noaa.gov.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-83.4153,43.97388],[-83.54213,43.71935],[-83.48904,43.68923],[-83.26318,43.97388],[-83.4153,43.97388]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":50375,"geometry":{"type":"Polygon","coordinates":[[[-83.65749999999997,44.01407000000006],[-83.70416999999998,43.95954000000006],[-83.64134999999999,43.941590000000076],[-83.58635999999996,43.99102000000005],[-83.65749999999997,44.01407000000006]]]},"properties":{"ESRI_OID":50375,"MSI_UID":50375,"ATU":9,"TITLE":"SAGINAW BAY - Au Gres Harbor/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116386127,"MRN":"urn:mrn:iala:wwy:us:navIV:dis9:stlawsea:lakont:lowniariv:niariv:lakeri:wesendoflakeri:detriv:lakstcla:stclariv:lakhur:sagbay:augrehar","WATERWAY_NAME":"Au Gres Harbor","CREATE_DATE":1785774596000,"MODIFIED_DATE":1785774666000,"BEGIN_DATE":1784851200000,"END_DATE":1788566399000,"DESCRIPTION":"General/Autonomous Vessel Operations\n\nFrom: 2026-07-24 To: 2026-09-04\n\nThe NOAA Great Lakes Environmental Research Laboratory (GLERL) will be conducting multiple scientific instrumentation deployments, including some Autonomous Surface Vessel (ASV) deployments between July 29 and September 4, 2026, in the area crosshatched in yellow on the attached map. The vessel will be on the water three days or less per week during that time period responding to weather driven events (heat waves, high precipitation, etc.). The ASV is a 16-foot single hull SeaTrac that operates on the water surface. Mariners are asked to keep a minimum distance of 200 feet away from the ASV. The vessel will be clearly marked with the word “SeaTrac” and the NOAA logo and will display navigation lights for a powered vessel of its size. The vessel will carry AIS and broadcast its position under the name “UNCREWED NOAA SP48” with an MMSI number of 338555458. The R4107, R4108, or the R2604 may be on scene during some operations and may be hailed on VHF-FM channel 16. For additional information, contact NOAA GLERL Marine Instrumentation Laboratory at 734-741-2235 or email oar.glerl.mil-team@noaa.gov.\n\n\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-83.6575,44.01407],[-83.70417,43.95954],[-83.64135,43.94159],[-83.58636,43.99102],[-83.6575,44.01407]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":50376,"geometry":{"type":"Polygon","coordinates":[[[-87.52833999999996,42.07734000000005],[-87.65330999999998,42.044710000000066],[-87.52833999999996,41.75544000000008],[-87.36079999999998,41.76159000000007],[-87.36354999999998,41.81074000000007],[-87.41709999999995,41.841440000000034],[-87.46379999999994,41.91711000000004],[-87.52833999999996,42.07734000000005]]]},"properties":{"ESRI_OID":50376,"MSI_UID":50376,"ATU":9,"TITLE":"LAKE HURON - LAKE MICHIGAN/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116386256,"MRN":"urn:mrn:iala:wwy:us:navIV:dis9:stlawsea:lakont:lowniariv:niariv:lakeri:wesendoflakeri:detriv:lakstcla:stclariv:lakhur:lakmic","WATERWAY_NAME":"LAKE MICHIGAN","CREATE_DATE":1785774633000,"MODIFIED_DATE":1785774671000,"BEGIN_DATE":1785196800000,"END_DATE":1786838399000,"DESCRIPTION":"General/Autonomous Vessel Operations\n\nFrom: 2026-07-31 To: 2026-08-14 (24 hours a day 7 days a week)\n\nExail Maritime Autonomy Solutions is conducting operations with an Uncrewed Surface Vehicles (USVs), called “DRIX18.” The DRIX18 UNCREW VESSEL (MMSI: 227690579) 7.7 meters in length, 1 meter tall, red in color, has a tricolor light on top and is marked \"UNCREWED SURFACE VESSEL\". The Drix is actuated by a diesel engine coupled with a propeller. DriX will be splashed from Crowley’s Yach Yard. DriX will be escorted with the RV Fluid Patrol 23 (rhib) in and out of any port. During the escorting, a DriX pilot will be onboard the support vessel, controlling DriX with a remote control. The main ports will be Hammond Marina and 31st Street Harbor. Once the DriX is out of the channel, it will be controlled from the Remote Operation Control center and the support vessel will go back to port. The support vessel will remain in standby while DriX is out surveying. Fluid Patrol 23 is available for entrance/exit from port and emergency recovery. All mariners are requested to transit the area with caution.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-87.52834,42.07734],[-87.65331,42.04471],[-87.52834,41.75544],[-87.3608,41.76159],[-87.36355,41.81074],[-87.4171,41.84144],[-87.4638,41.91711],[-87.52834,42.07734]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}}]}