| Document Name | Description | Format | Size | Date Posted |
|---|---|---|---|---|
| COM CIRC1.pdf | Revision of the International Code of Signals and Proposed International RadioTelephone Code | 52 kb | 15-Jun-62 | |
| COM CIRC2.pdf | Co-Ordination of Safety at Sea and in the Air | 231 kb | 21-Sep-62 | |
| COM CIRC3.pdf | Co-Ordination of Safety at Sea and in the Air | 53 kb | 4-Mar-63 | |
| COM CIRC4.pdf | Revision of the International Code of Signals | 40 kb | 8-Mar-63 | |
| COM CIRC5.pdf | Emergency Position-Indicating Radio Beacons | 39 kb | 13-May-63 | |
| COM CIRC6.pdf | Interference Level on the RadioTelegraph Distress Frequency Direction-Finding by Ships on the 2 Mc/s Band | 209 kb | 15-May-63 | |
| COM CIRC7.pdf | RadioCommunication Requirements for the Ocean Data Service of the Intergovernmental Oceangraphic commission | 303 kb | 30-Jan-64 | |
| COM CIRC8.pdf | RadioCommunication Requirements for the Ocean Data Service of the International Oceangraphic commission | 66 kb | 30-Apr-64 | |
| COM CIRC9.pdf | Listening for Distress Calls | 1902 kb | 30-Apr-64 | |
| COM CIRC9-Corr1.pdf | Listening for Distress Calls | 15 kb | 11-Dec-64 | |
| COM CIRC102.pdf | INMARSAT EGC Safetynet System Draft International Safety Manual | 1036 kb | 31-May-90 | |
| COM CIRC102-Rev1.pdf | INMARSAT EGC Safetynet System Draft International Safety Manual | 135 kb | 4-May-92 | |
| COM CIRC102-Rev2.pdf | INMARSAT EGC Safetynet System Draft International Safety Manual | 1517 kb | 7-Jul-93 | |
| COM CIRC102-Rev3.pdf | INMARSAT EGC Safetynet System Draft International Safety Manual | 1171 kb | 3-Jul-91 | |
| COM CIRC103.pdf | Design and Installlation Guidelines for INMARSAT standard-C ship earth stations and Enhanced Group Call (EGC) receivers | 546 kb | 31-May-90 | |
| COM CIRC104.pdf | Coding of 406 MHz Satellite EPIRBs | 58 kb | 26-Jun-91 | |
| COM CIRC105.pdf | Clarification of Certain Provisions of the 1988 SOLAS Amendments for the GMDSS | 91 kb | 6-Aug-91 | |
| COM CIRC106.pdf | Testing of MF Digital Selective Calling Equipment Installed for Distress and Safety by ships and coast stations | 23 kb | 6-Aug-91 | |
| COM CIRC107.pdf | Shortage of Supply of 406 MHz EPIRBs | 17 kb | 5-Aug-91 | |
| COM CIRC108.pdf | GMDSS Operating Guidance for Masters of Ships in Distress Situations | 32 kb | 23-Jan-92 | |
| COM CIRC109.pdf | Use if Frequency 8364 KHz for Survival Craft | 15 kb | 23-Apr-92 | |
| COM CIRC110.pdf | Clarification of SOLAS Regulations IV/ 6.1, IV/ 6.2.2 and IV/ 10.1.1.3 | 24 kb | 8-Feb-93 | |
| COM CIRC110-Corr1.pdf | Clarification of SOLAS Regulations IV/ 6.1, IV/ 6.2.2 and IV/ 10.1.1.3 | 9 kb | 16-Mar-93 | |
| COM CIRC111.pdf | Standard Report Formats for Piratical Incidents | 37 kb | 10-Feb-93 | |
| COM CIRC112.pdf | Implementation of Maritime Safety Information (MSI) Broadcasts VIA SAFETYNET in areas not covered by NAVTEX | 19 kb | 10-Feb-93 | |
| COM CIRC113.pdf | Provisions of Maritime Safety Information (MSI) Broadcasts in the International SAFETYNET Service | 143 kb | 10-Feb-93 | |
| COM CIRC114.pdf | IMO/IHO Guide to Drafting Radio Navigational Warnings for the World-Wide Navigational Warning service | 265 kb | 10-Feb-93 | |
| COM CIRC114Rev1.pdf | IMO/IHO Guide to Drafting Radio Navigational Warnings for the World-Wide Navigational Warning service | 262 kb | 27-May-94 | |
| COM CIRC115.pdf | Discontinuation of Morse Code Services in the MF Radiotelegraphy band | 28 kb | 10-Feb-93 | |
| COM CIRC116.pdf | Provision of GMDSS Radio Installations with Positions Updating Facility | 26 kb | 11-Jan-94 | |
| COM CIRC117.pdf | Clarification of the application if certain provisions of chapter IV of the SOLAS convention | 18 kb | 10-Jan-94 | |
| COM CIRC122.pdf | Selection of More than one fixed area in the INMARSAT-C Systems | 23 kb | 14-Feb-95 | |
| COM CIRC123.pdf | List of NAVAREA Coordinators | 59 kb | 14-Feb-95 | |
| COM CIRC124.pdf | IMO/IHO Guide to Drafting Radio Navigational Warnings for the World-Wide Navigational Warning service | 282 kb | 20-Feb-95 | |
| COM CIRC125.pdf | Recommendations on the use of batteries for two-way VHF Radiotelephone apparatus | 44 kb | 20-Feb-95 | |
| COM CIRC127.pdf | Guidelines for Avoiding False Distress Alerts | 176 kb | 23-Feb-95 | |
| COM CIRC128.pdf | Guidelines for use in Evaluating regional Mobile Satellite Systems | 89 kb | 22-May-95 | |
| COM CIRC129.pdf | Amendments to the International Code of Signals | 49 kb | 21-Jul-95 |
NOTE: The most recent Circulars may also be found at the IMO's website.