The long-range identification and tracking system is a designated international Maritime Organisation(IMO) system designed to collect and disseminate vessel position information received from IMO member states that are subject to the international convention for the safety of life at sea (SOLAS).

The US coast guard (USCG ) maintains a national data centre (NDC) the NDC monitors IMO member states ships that are 300 get tons or greater on an international voyage and either bound for a US Port or travelling within 1000 nautical mile of US coast.

LRIT(The long-range identification and tracking system) -compliments existing classified and unclassified systems to improve maritime domain awareness.

LRIT(The long-range identification and tracking system) provides an enhanced level of maritime domain awareness that is the first of its kind.

LRIT is a satellite-based real-time reporting mechanism that allows unique visibility to position reports of vessel the AIS system reveals the identity and movement of the ship to all stations in the vicinity.
LRIT enhances the safety and security of shape and also to assist in search and rescue operations this is basically a closed loop system and the ship transmit the following data:-
1.ship identity.
2.ships location. and time of transmission.


The LRIT system consists of –
1) The ship borne LRIT information transmitting equipment.
2) The communication service provider
3) The application service providers
4) The LRIT data centres

Recipients of LRIT Information
1) Flag State -the flag state may track ships within its own fleet anywhere in the world.
2) Port State – the port state may set its own requirements for ships that have indicated that they are calling at its port.
3) Coastal State – the coastal state may obtain tracking information for ships navigating within distance up to 1000 nautical mile of their coast.
4)SAR – contracting government can request information on ships in an area where SAR operation underway.

Why are we having LRIT when we have AIS?
LRIT provides global tracking of vessels and also long-range tracking of all vessels within 1000 nautical mile of coastal State. AIS Satellite technologies improve tracking capabilities and LRIT will continue to provide an additional tracking source of information.