CFR /  Title 33  /  Part 169  /  Sec. 169.205 What types of ships are required to transmit LRIT

The following ships, while engaged on an international voyage, are required to transmit position reports:

(a) A passenger ship, including high speed passenger craft.

(b) A cargo ship, including high speed craft, of 300 gross tonnage or more.

(c) A mobile offshore drilling unit while underway and not engaged in drilling operations.