IMO Documents Categories IMO Guidance List IMO Conventions SAR Administration SAR Operations Medical Communications - Systems Communications - Procedures Maritime Safety Information Other Information Model Courses IMO Meeting Reports & Various Shop Resources IMO Documents Maritime Safety Information IMO Resolutions MSC.305(87) - Guidelines on Operational Procedures for the Promulgation of MSI Concerning Acts of Piracy and Piracy Counter-Measure Operations A.705(17) Amendments - Promulgation of MSISee Circular MSC.1/Circ.1287/Rev.1 A.706(17) Amendments - World-Wide Navigational Warning ServiceSee Circular MSC.1/Circ.1288/Rev.1 A.1051(27) - IMO/WMO Worldwide Met-Ocean Information and Warning Service – Guidance Document IMO Circulars COMSAR/Circ.3 - Relations Between Navarea Co-ordinators and Rescue Co-ordination Centres COMSAR/Circ.36 - Broadcast of Warnings for Tsunamis and Other Natural Disasters COMSAR.1/Circ.41 - Analysis of MSI Promulgated Via the EGC SafetyNET System and Recommendations on Improving its Quality COMSAR.1/Circ.46 - AIS Safety-Related Messaging COMSAR.1/Circ.58/Rev.1 - Lists of Navarea and Metarea coordinators – 31 Oct 2018Note that this Circular is updated fairly frequently MSC.1/Circ.1287/Rev.1 - Promulgation of Maritime Safety Information MSC.1/Circ.1288/Rev.1 - World-Wide Navigational Warning Service MSC.1-Circ.1310-Rev.1: Revised Joint IMO IHO WMO Manual on MSI