Definition(s)
Long Range Identification and Tracking (LRIT)
A system which requires certain vessels to automatically transmit their identity, position and date/time at 6-hour intervals in accordance with SOLAS regulation V/19-1.
Source: IMO MSC.1/Circ.1343, amendments to the International Aeronautical and Maritime Search and Rescue (IAMSAR) Manual, 24 May 2010, International Maritime Organization. Regulatory Guidance