Support vessel
Support vessel means a vessel working for a licensee at a deepwater port or cleared by a licensee to service a tanker calling at a deepwater port, and includes a:
(1) Tug;
(2) Line-handling boat;
(3) Crew boat;
(4) Supply vessel;
(5) Bunkering vessel;
(6) Barge; or
(7) Other similar vessel.