Above-normal tides near the center of a hurricane maybe caused by the （）.

单项选择题A vessel not to impede the passage of another vessel is not relieved （） taking collision-avoiding action.

A.on
B.of
C.in
D.for

单项选择题A vessel is entering port A for the first time and has a Pilot conning the vessel. The Master is unsure that the Pilot is taking sufficient action to prevent a collision. What should the Master do（）.

A.Nothing; The Pilot is required by law and is solely responsible for the safety of the vessel
B.State his concerns to the Pilot but do not interfere with the handling of the vessel
C.Direct the Pilot to stop the vessel and anchor if necessary until the situation clears
D.Recommend an alternative action and if not followed relieve the Pilot

单项选择题A tug is to assist in docking an oceangoing vessel on a hawser. The greatest danger to the tug is （）.

A.from the ship's propeller when making up aft
B.from being overrun if making up forward
C.hull damage while alongside passing a hawser
D.getting in a tripping position

单项选择题A pilot vessel on pilotage duty shall show identity lights （）.

A.at any time while underway
B.while at anchor
C.while alongside a vessel
D.All of the above

单项选择题A pilot vessel on pilotage duty at night will show sidelights and a sternlight （）.

A.when at anchor
B.only when making way
C.at any time when underway
D.only when the identifying lights are not being shown