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U.S. Department of Homeland Security

Maritime Security Levels (MARSEC)

Captain of the Port Zone MARSEC Level Notes Date Set
BOSTON
CHARLESTON
COLUMBIA RIVER
CORPUS CHRISTI
DELAWARE BAY
DETROIT
DULUTH
EASTERN GREAT LAKES
GUAM
HONOLULU
HOUMA
HOUSTON-GALVESTON
JACKSONVILLE
KEY WEST
LAKE MICHIGAN
LONG ISLAND SOUND
LOS ANGELES-LONG BEACH
LOWER MISSISSIPPI RIVER (MEMPHIS)
MARYLAND-NCR
MIAMI
MOBILE
NEW ORLEANS
NEW YORK
NORTH CAROLINA
NORTHERN GREAT LAKES
NORTHERN NEW ENGLAND (PORTLAND, MAINE)
OHIO VALLEY
PITTSBURGH
PORT ARTHUR AND LAKE CHARLES
PRINCE WILLIAM SOUND (VALDEZ)
SAN DIEGO
SAN FRANCISCO
SAN JUAN
SAVANNAH
SEAK - SOUTHEAST ALASKA (JUNEAU)
SEATTLE (PUGET SOUND)
SOUTHEASTERN NEW ENGLAND (PROVIDENCE)
ST. PETERSBURG
UPPER MISSISSIPPI RIVER (ST. LOUIS)
VIRGINIA
WESTERN ALASKA (ANCHORAGE)