(a.) Going upon the sea; especially, sailing upon the deep sea; -- used in distinction from coasting or river, as applied to vessels.

Naval Construction Battalion Naval Reservist RN Royal Marine Royal Navy Seabee Seabees USN United States Navy abyssal aquatic argosy armada bathyal bathybic bathymetric bathyorographical bathysmal benthic bluejacket boot cadet coast guard deep-sea division escadrille fleet flotilla fluvial fluviatile frogman gob horse marine hydrographic jolly lacustrine maritime merchant fleet merchant marine merchant navy midshipman midshipmite mosquito fleet nautical naval naval cadet naval forces naval militia naval reserve navigational navy navy man ocean-going oceanic oceanographic pelagic salty sea seafaring seagoing seamanlike seamanly squadron swabbie task force task group terriginous thalassic water-borne