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| Subject | English | Thesaurus |
| abbr. | American Institute of Maritime Services | AIMS |
| abbr., scottish | Maritime Air Co-ordination Authority | MACA |
| USA | Maritime Security Program | A program authorized in the Maritime Security Act of 2003 requiring the Secretary of Transportation, in consultation with the Secretary of Defense, to establish a fleet of active, commercially viable, militarily useful, privately-owned vessels to meet national defense and other security requirements (JP 4-01.2) |
| abbr., nautic. | Panama Maritime Documentation Services | PMDS (Lesya1986) |
| abbr., foreig.aff. | Programme of the Arctic Maritime Environment | PAME |
| abbr., astronaut., mil. | Radio Technical Commission for Maritime Services | RTCM |