To safely anchor a vessel there must be sufficient scope in the anchor cable. Scope is the ratio of（）.

A . An amount equal to the depth of the water B . Two times the depth of water C . Three to four times the depth of water D . Five to seven times the depth of water

A . much than B . more than C . many than D . lot tha

A . Port B . Commercial area C . Berth D . Roadstead

A . an anchor light B . sidelights and a stern light C . three lights in a vertical line，the highest and lowest being red，and the middle being white D . None of the above

A . A vessel engaged in underwater operations B . A vessel engaged in mine clearance C . A vessel engaged on pilotage duty D . A vessel engaged in survey operatio

A . Ground speed B . Boarding speed C . Relative speed D . Speed of the vessel

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

A . underway B . making way C . dead in the water D . a power driven vessel

A . in restricted visibility B . in congested waters C . during darkness D . at all time

A . provide elasticity B . increase the strength C . reduce the cost D . reduce the weight

A . A power-driven vessel B . A vessel engaged on pilotage duty C . A vessel dredging D . A vessel restricted in her ability to maneuver

A . To moor B . to berth C . to anchor D . to ride at anchor

A . aid turing the ship B . obtain a fine bearing C . increase ship swing to wind or tide D . lighten the stress of anchor chai

A、cross the channel as you are the stand-on vessel B、cross only if the vessel in the channel is approaching on your port side C、not cross the channel if you might impede the other vessel D、sound the danger signal

A . aid turning the ship B . obtain a fine bearing C . increase ship swings to wind or tide D . lighten the stress of anchor chai

A . stem the current and make very slow headway when the anchor is dropped B . stem the current and be falling aft very slowly when the anchor is dropped C . stem the current and endeavor to make neither headway nor sternway when the anchor is dropped D . stop all headway through the water and keep the current astern when the anchor is dropped

A . dredging ( of anchor ) B . dragging ( of anchor ) C . weighing anchor D . walking out anchor

A . Anchor may be dropped from the hawse pipe B . Anchor should be lowered to within 2 fathoms of the bottom before being dropped C . Scope should always be at least ten times the depth of the water D . Scope should always be less than 5 times the depth of the water

A . pelican hook B . connecting link C . shackle D . retaining hook

A . a 5 second ringing of a bell forward and a 5 second sounding of a gong aft at intervals of 1 minute B . one prolonged followed by two short blasts every 2 minutes C . one prolonged followed by three short blasts every minute D . one prolonged followed by three short blasts every 2 minute

A . Three lights in a vertical line，the highest and lowest red and the middle white，and anchor lights B . Three lights in a vertical line，the highest and lowest red and the middle white，ONLY C . Anchor lights ONLY D . Anchor lights and sidelights ONLY

A . reduce the length of the cable B . pay out more anchor cable C . back the engines D . swing the rudder several times to work the anchor into the bottom

A.A vessel shall proceed near the other vessel on her starboard side on the narrow channel since it is safe and practicable B.A vessel shall avoid proceeding near the starboard outer limit of a narrow channel as long as it is safe and practicable C.A vessel shall avoid proceeding along the channel because it is not safe and practicable D.A vessel shall proceed near the starboard outer limit of a narrow channel to the degree in which it is safe and practicable