A.Restricted area
B.Closed area
C.Prohibited place
D.Forbidden place
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The boat is stowed on the davit rather than on a cradle with which type of davit?（）
As the propeller turns，voids are formed on the trailing and leading edges of the propeller blades causing a loss of propulsive efficiency，pitting of the blades，and vibration. These voids are known as（）.
On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.
Cargo pump relief valves are piped to the（）.
Permission is kindly requested（）the ballast water.
The exhaust pipe must be gas tight throughout its entire length otherwise（）.
Anchors are prevented from running out when secured by the（）.
If the engine of a survival craft does not start，check to see（）.
In ship construction，keel scantlings should be the greatest（）.
Centrifugal pumps have what advantage(s) over reciprocating pumps?（）.