Gross Ton - "(GRT) A measure of vessel capacity (in cubic feet) of the space within the hull, and of enclosed spaces above deck, available for cargo, stores, fuel, passengers and crew, with certain exclusions. One hundred cubic feet is equivalent to one gross ton. "
Category: - Maritime

Grounding - To touch bottom and become stranded.
Category: - Maritime - Risk

Ground Search And Rescue Incident - Any incident not otherwise classified as an aeronautical or maritime incident and involving missing persons or persons in distress. "incident de recherche et sauvetage au sol"
Category: - SAR

Ground Tackle - The anchor, chain and rode.
Category: - Maritime

GRT - "(Gross Registered Ton) A measure of vessel capacity (in cubic feet) of the space within the hull, and of enclosed spaces above deck, available for cargo, stores, fuel, passengers and crew, with certain exclusions. One hundred cubic feet is equivalent to one gross ton. "
Category: - Maritime - Acronym

Gudgeons - Bosses on stern post drilled for pins (Pintles) on which rudder swings.
Category: - Maritime

Gulf Stream - A warm, relatively swift and narrow ocean current that runs up the east coast of North America, south of Newfoundland and into the North Atlantic.
Category: - Maritime - Weather

Gunwale - The railing of the boat at deck level; The junction of deck and shell at top of sheer strake.
Category: - Maritime

Gust - A sudden, brief increase in wind speed, generally less than 20 seconds.
Category: - Weather

Gyro-Compass - A mechanical compass operated by means of a gyroscope. This compass indicated true north rather than magnetic north.
Category: - Maritime