Take charge of marine vessels on the high seas.
Commands ship to transport passengers, freight, and other cargo across oceans, bays, lakes, and in coastal waters: Sets course of ship, using navigational aids, such as charts, area plotting sheets, compass, and sextant, and orders crew worker at helm to steer ship. Determines geographical position of ship, using loran or azimuths of celestial bodies. Inspects ship to ensure that crew and passengers observe regulations pertaining to safety and efficient operation of ship. Coordinates activities of crewmembers responsible for signaling devices, such as ship’s whistle, flashing lights, flags, and radio, to signal ships in vicinity. Calculates landfall, using electronic sounding devices and following contour lines on chart. Avoids reefs, outlying shoals, and other hazards to shipping, utilizing aids to navigation, such as lights, lighthouses, and buoys. Relinquishes command of ship to PILOT, SHIP to guide ship through hazardous waters. Signals TUGBOAT CAPTAIN to berth ship. Maintains ship’s log. Must be licensed by U.S. Coast Guard for steam, motor, or sail ship according to waters navigated and tonnage of ship. May be designated according to waters licensed to navigate as Master, Bays, Sounds, And Lakes; Master, Coastal Waters; Master, Great Lakes; Master, Ocean.