선박의 밀폐된 내부 전체 부피를 나타내는 단위인 총등록톤수.
Gross Registered Tonnage; a unit of measurement for a ship's total internal volume, where one register ton equals 100 cubic feet.
예문:
"The port authority calculates docking fees based on the vessel's GRT."
"The new cruise liner has a GRT of over 150,000 tons."
"The certificate clearly states the GRT of the cargo ship."