MARITIME SAFETY INFORMATION (MSI)
Maritime Safety Information (MSI) is a one of the functional requirements of GMDSS ships. The International Maritime Organization and International Hydrographic Organization established the World Wide Navigational Warning Service (WWNWS) and has established 16 NAVAREAs worldwide.
Search and Rescue information will come from the U.S. Coast Guard. And, the National Weather Service will provide weather and Ice monitoring.
As indicated in IMO Master Plan of Shore-Based Facilities (this publications must be carried on board each ship under the GMDSS rules) MSI can be received by three different systems: NAVTEX, SafetyNET and High Frequency NBDP.
As indicated in FCC rules 47 CFR 80.1085 GMDSS compulsory vessel must provide a radio facility for the receipt of MSI. If ship is engaged on voyages in any area of INMARSAT coverage in which International NAVTEX service is NOT established or provided, equipment to receive Enhanced Group Galling (EGG) over the Safety NEPM or HF Radio must be provided. In areas where INMARSAT does not cover then HF NBDP would be the approved method.
The NAVTEX system which is one system of three to obtain MSI. This system is a terrestrial (land radio station)system using Narrow Band Direct Printing (NBDP) with Forward Error Correction (FEC) the same as SITOR. The world wide frequency 518 Khz (0.518 MHZ) and the radio receiving range is about 200 to 400 Nautical Miles offshore.
NAVTEX carries information for all sizes and types of vessels. The English language is used as the world wide language. Frequency 490 Khz is available for a country to use their own language on the broadcasts on this worldwide NAVTEX frequency and is NBDP using mode FEC. The system uses the present NAVAREAs as regions for the transmissions. By MARITIME SAFETY INFORMATION (MSI)
Receipt of Maritime Safety Information (MSI) is a one of the functional requirements of GMDSS ships. The International Maritime Organization and International Hydrographic Organization established the World Wide Navigational Warning Service (WWNWS) and has established 16 NAVAREAs worldwide.
Search and Rescue information will come from the U.S. Coast Guard. And, the National Weather Service will provide weather and Ice monitoring.
As indicated in IMO Master Plan of Shore-Based Facilities (this publications must be carried on board each ship under the GMDSS rules) MSI can be received by three different systems: NAVTEX, SafetyNET and High Frequency NBDP.
As indicated in FCC rules 47 CFR 80.1085 GMDSS compulsory vessel must provide a radio facility for the receipt of MS/. If ship is engaged on voyages in any area of INMARSAT coverage in which International NAVTEX service is NOT established or provided, equipment to receive Enhanced Group Galling (EGG) over the SafetyNEPM or HF Radio must be provided. In areas where INMARSAT does not cover then HF NBDP would be the approved method.
The NAVTEX system which is one system of three to obtain MSI.
This system is a terrestrial (land radio station)system using Narrow Band Direct Printing (NBDP) with Forward Error Correction (FEC) the same as SITOR. The world wide frequency 518 Khz (0.518 MHZ) and the radio receiving range is about 200 to 400 Nautical Miles offshore.
NAVTEX carries information for all sizes and types of vessels. The English language is used as the world wide language. Frequency 490 Khz is available for a country to use their own language on the broadcasts on this worldwide NAVTEX frequency and is NBDP using mode FEC. The system uses the present NAVAREAs as regions for the transmissions. By using geographical separation, minimum transmitter power and sharing of time on these frequencies interference is kept to a minimum.
