Tag Archives :MMSI

An MMSI is a unique nine digit number that is entered into certain marine radio communications equipment. When using this equipment to send a distress alert, or to indicate some other emergency, the number assists emergency services to identify you and/or your vessel. Since marine VHF transceivers now operate under a class licence, there is no requirement for an official call sign and maritime ship station license,  ...

There are two types of maritime VHF radio: Handheld and fixed, in which the fixed maritime VHF radio contains MMSI code. Different brands of maritime VHF radios have different editing methods for MMSI code. The following is a brief introduction to the MMSI code editing method of RA27.  ...

The AIS system is using the MMSI, not the IMO number, to identify a vessel. The IMO number is part of the static AIS information provided by the vessel crew and can be transmitted additionally. So it could happen if you are searching a vessel in the vessel database by its IMO number that you find more than one entry because the vessel had different MMSI numbers in the past.  ...

MMSI is Maritime Mobile Service Identity and a unique 9 digit number that is entered into DSC-marine radio equipment. The MMSI number contain you or your vessel information. When using this equipment to send a distress alert or to indicate some other emergency, the number is transferred into the coast guard’s database to assists the emergency services center to identify you or your vessel and react quickly.  ...

MMSI is Maritime Mobile Service Identity and a unique 9 digit number that is entered into DSC-marine radio equipment. The MMSI number contain you or your vessel information. When using this equipment to send a distress alert or to indicate some other emergency, the number is transferred into the coast guard’s database to assists the emergency services center to identify you or your vessel and react quickly.  ...

Digital Selective Calling—DSC—is one of those features that, despite having been standard on every fixed-mount VHF for more than a decade, is little understood and little used by recreational sailors. One reason is perhaps that it requires two devices to be wired together—a process that requires some head-scratching if the two are from different manufacturers. Another might be that DSC requires you to obtain a Marine Mobile Service Identity (MMSI) number that must be programmed into the radio.  ...

In the United States, the National Telecommunications Administration (NTIA) provides MMSIs to federal users, and the Federal Communication Commission (FCC) provides MMSIs to everyone else.  NTIA is as Executive Branch agency under the Department of Commerce, and the FCC is an independent agency.  ...

Its been several years since the Automatic Identification System (AIS) became a mandated way of life for the commercial side of the marine industry. it has become one of the more valuable electronics  ...

Digital Selective Calling (DSC) is primarily used to initiate distress calls to shore stations and other vessels via your DSC radio. All DSC-equipped shore stations and vessels will hear your distress signal as an alarm. It will be repeated every 4 minutes until acknowledged. A DSC alert signal has a 15% greater range than a voice transmission and therefore is more likely to reach a vessel or rescue center  ...

Retevis powerful VHF RA27 marine radios have been designed for both OEM and aftermarket applications. Featuring an updated industrial design and sleek aesthetics. The RA27 is Retevis’s entry-level radio, offering 25W of transmit power and Class D Digital Selective Calling (DSC) compatibility via NMEA 2000.  ...