If there is a strike or lock-out affecting the cargo on or after vessel’s arrival at port of discharge and the same has not been settled within 48 hours，Receivers shall have the option of keeping vessel waiting until such strike or lock-out is at an end against paying half demurrage after expiration of the time prescribed for discharging or ordering the vessel to a substituting port．The “same” refers to（）.

To safeguard the operator and other personnel working on or near a hoisting operation which of the following precautions should be observed?（）

If there are any Certificates expired or nearing expiry the master of a ship must shall apply fortheir （） at any port.

When your vessel is on or near the path of an approaching tropical storm the（）.

In extreme weather conditions, either hot or cold, control of the air conditioning plant presents （） difficulties.

Repairing damage to the hull at or above the waterline reduces the threat of（）.

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

Course directed by the OSC or CSS to be steered at the beginning of a search is（）.

Course directed by the OSC or CSS to be steered at the beginning of a search is（）.

Course directed by the 0SC or CSS to be steered at the beginning of a search is（）.

Sometimes lights are（）by fog，haze，dust，smoke，or precipitation which may be present at the light，or between the light and the observer，and which is possibly unknown by the observer.