单选题“AMIDSHIPS” refers to （）.Aback of the vesselBthe middle portion of a shipCa backward movement of a vesselDacross the ship, at right angles to the fore-and-aft centerline
单选题
“AMIDSHIPS” refers to （）.
A
back of the vessel
B
the middle portion of a ship
C
a backward movement of a vessel
D
across the ship, at right angles to the fore-and-aft centerline
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