The Safety of Life at Sea (SOLAS) Convention Chapter V, Regulation 19-1 (SOLAS V/19-1), makes LRIT mandatory for passenger ships, including high speed craft, cargo ships of 300GT and above and MODU (rigs). Ships must automatically report their identity, date & time and position 4 times daily, Ships constructed after 31st December 2008 must be fitted with LRIT equipment, Ships constructed before then will be phased in depending on their operational area. Ships approved for GMDSS sea areas A1 & A2 or A2 & A3 must comply no later than the first radio survey after 31st December 2008; Ships operating in Sea Area A4 must comply no later than the first radio survey after 1st July 2009.
Ships operating only in sea area A1 and fitted with Automatic Identification System (AIS) are exempted. Ships operating in near-coastal Sea Area A2 not fitted with Inmarsat C GMDSS will be required to fit a compliant terminal. Ships operating in polar Sea Area A4 above 70 degrees latitude will require a non-Inmarsat terminal that operates in conjunction with a low-earth orbit Communication Service Provider (CSP) approved by the Flag in conjunction with its appointed Application Service Provider (ASP).