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Maritime identification digits are used by radio communication facilities to identify their home country or base area in digital selective calling (DSC), Automatic Transmitter Identification System (ATIS), and Automatic identification system (AIS) messages as part of their Maritime Mobile Service Identities.
AIS is intended to assist a vessel's watchstanding officers and allow maritime authorities to track and monitor vessel movements. AIS integrates a standardized VHF transceiver with a positioning system such as a Global Positioning System receiver, with other electronic navigation sensors, such as a gyrocompass or rate of turn indicator. Vessels ...
This contrasts to the Automatic identification system (AIS) used globally on ships that transmit continuously. A short post-transmission message is sent by the radio with the vessel identity and is in the form of an encoded call sign or Maritime Mobile Service Identity , starting with number "9" and the three country-specific maritime ...
9 Devices using a free-form number identity: [2] Search and Rescue Transponders (970yyzzzz) [note 2] [4] [note 3] [5] Man overboard DSC and/or AIS devices (972yyzzzz) [note 2] 406 MHz EPIRBs fitted with an AIS transmitter (974yyzzzz) [note 2] craft associated with a parent ship (98MIDxxxx) [note 4] navigational aids (AtoNs; 99MIDaxxx) [note 5 ...
Tactical number - a number painted on the hull of a military ship, for identification either during combat or peacetime. [1] [2] [3] Sail number - unique identifiers used especially for racing yachts but also windsurfers, and displayed on the sail to assist with search and rescue operations. The sail code prefixes are mandated by World Sailing.
The Maritime Safety & Security Information System (MSSIS) is a freely-shared, unclassified, near real-time data collection and distribution network. Its member countries share data from Automatic Identification System (AIS), coastal radar, and other maritime-related systems. [1]
The IMO number of the International Maritime Organization is a generic term covering two distinct meanings. The IMO ship identification number is a unique ship identifier; the IMO company and registered owner identification number is used to identify uniquely each company and/or registered owner managing ships of at least 100 gross tons (gt).
The only similarity is that AIS is also collected from space for determining location of vessels, but requires no action from the vessels themselves except they must have their AIS system turned on. LRIT requires the active, willing participation of the vessel involved, which is, in and of itself, a very useful indication as to whether the ...