What are the US Coast Guard regulations regarding my ship?
Regulations recently approved by the US Coast Guard (and which go into effect as of June, 2006) state that all merchant marine vessels operating and/or docking in US-controlled waters are required to maintain a screening breath alcohol tester (breathalyzer) on board at all times. There should be at least one individual on board that can properly operate a breathalyzer, conduct a breath test and interpret the results, although strict DOT qualification is not necessary.

US Coast Guard Forms (Sample Drug & Alcohol Policy, Sample USCG Reports)