The ocean bottom that extends from the shoreline out to an area where there is a marked change in slope to a greater depth is the().
A、abyssal plain
B、continental shelf
C、borderland
D、offshore terrace
A、abyssal plain
B、continental shelf
C、borderland
D、offshore terrace
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、the vessel has enough room to swing while at anchor B、the anchor flukes bite into the ocean bottom C、there is a sufficient scope of chain to keep the anchor on the bottom D、there is more chain out than there is in the chain locker
A、A.by the bow B、B.by the stern C、C.at the end nearest the bottom D、D.evenly fore and aft
A、The first line at the bottom B、The second line from the bottom C、The third line from the bottom D、The fourth line from the bottom
A、the vessel has enough room to swing while at anchor B、the anchor flukes bite into the ocean bottom C、there is sufficient weight from the anchor and chain to prevent dragging D、there is more chain out than there is in the chain locker