The height of a light is measured from which reference plane?()
A、Mean low water
B、Mean high water
C、Average water level
D、Geographical sea level
A、Mean low water
B、Mean high water
C、Average water level
D、Geographical sea level
A、metacentric height B、height of the righting arm C、fore and aft perpendicular D、height of the center of buoyancy
A、metacentric height B、height of the metacenter above the keel C、height of the center of buoyancy above the keel D、height of the center of gravity above the keel
A、height of the metacenter B、height of the righting arm C、height of the center of buoyancy D、metacentric height
A、height of the metacenter B、height of the righting arm C、height of the center of buoyancy D、metacentric height
A、A.height of the metacenter B、B.height of the righting arm C、C.height of the center of buoyancy D、D.metacentric height
A、vertical distance from the tidal datum to the ocean bottom plus the height of the tide B、vertical distance from the tidal datum to the ocean bottom C、average height of water over a specified period of time D、average height of all low waters at a place
A、vertical distance from the chart sounding datum to the ocean bottom,plus the height of tide B、vertical distance from the chart sounding datum to the ocean bottom C、average height of water over a specified period of time D、average height of all low waters at a place
A、uncorrected KG B、maximum allowed KG C、virtual height of the center of gravity D、metacentric height
A、uncorrected KG B、maximum allowed KG C、virtual height of the center of gravity D、metacentric height
A、uncorrected KG B、virtual height of the center of gravity C、metacenter D、metacentric height