Section 89.18 - Record of certification of vessels of special construction or purpose(a) Copies of Certificates of Alternative Compliance and documentation concerning Coast Guard vessels are available for inspection at the offices of the Marine Transportation Systems Directorate, U.S. Coast Guard Headquarters (CG-5PW), Stop 7509, 2703 Martin Luther King Avenue SE., Washington, DC 20593-7509.(b) The owner or operator of a vessel issued a Certificate shall ensure that the vessel does not operate unless the Certificate of Alternative Compliance or a certified copy of that Certificate is on board the vessel and available for inspection by Coast Guard personnel.CGD 80-187, 47 FR 13801, Apr. 1, 1982, as amended by CGD 88-052, 53 FR 25120, July 1, 1988; CGD 96-026, 61 FR 33663, June 28, 1996; CGD 97-023, 62 FR 33363, June 19, 1997; USCG-2002-12471, 67 FR 41332 , June 18, 2002; USCG-2010-0351, 75 FR 36281 , June 25, 2010; USCG-2014-0410, 79 FR 38431 , July 7, 2014