The Navigation Rules state that a vessel shall be operated at a safe speed at all times so that she can be stopped within（）.

A . the distance of visibility B . 1/2 the distance of visibility C . a distance appropriate to the existing circumstances and conditions D . the distance that it would require for the propeller to go from full ahead to full aster

A . Ground waves B . Skywaves C . Either ground waves or skywaves interchangeably D . An average between ground wave and skywave positio

A . lash B . fasten C . bind D . tie

A . radio communications that are available B . maximum speed of your vessel C . temperature D . current

A . there are no other vessels around B . operating in a narrow channel C . the Master enters it in the ship's log D . necessary to avoid immediate danger

A . not be regarded as a vessel B . in general，keep well clear of all vessels C . proceed at a slower speed than surrounding vessels D . when making way，show the lights for a vessel not under command

A . a green star signal B . orange-colored smoke C . red flares D . the repeated raising and lowering of outstretched arm

A . stopping the main engine suddenly B . changing the main engine running direction suddenly C . the sailing from the shallow water area to the deep water area D . the ship’s trim too much

A . The rules require vessels to comply with Traffic Separation Scheme regulations B . The rules use the term safe speed C . The Rules permit a stand-on vessel to take action prior to being in extremis D . All of the above are correct

A . there are other vessels in the vicinity B . operating in a traffic separation scheme C . engaged in a situation involving more than two vessels D . necessary to avoid immediate danger

A . non-self-propelled raft B . seaplanes C . hovercrafts D . All of the above

A . the stopping engine suddenly B . the sailing astern and changing direction suddenly C . the sailing from the shallow water area to the deep water area D . the ship’s trim too much

A . Deep Flood B . Direction Finder C . Double Freeboard D . Dangerous Fertilizer

A.Setting nets B.Trawling C.Using a dredging net D.Trolling

A、channel B、peck C、panel D、team

A.the stopping engine suddenly B.the sailing astern and changing direction suddenly C.the sailing from the shallow water area to the deep water area D.the ship’s trim too much

It is not recommended that any person shall be allowed on the bridge or in the pilot house except the pilot and other representative of the Canal，and Master and such officers and other members of the crew of the vessel as may be necessary for its navigation and control，management，operation and safety． Navigational aids are difficult to maintain and are reported to be unreliable in this waters．A considerable amount of shipping uses the canal and，in addition，many local fishing craft with nets may be encountered in the area.Since passage through the canal entails a run of more than 250 miles，long periods of considerable vigilance are necessary in order to maintain safe standards of navigation． 问题：PILOT HOUSE is referred to ______ in this passage． A.the cabin in which the pilot stays B.the space in which the rudder is located C.the bridge of vessels D.the cabin which is prepared for the pilot SHIPPING is referred to ______ in this passage．A.he operations of transportation of goods by sea B.the procedures of marine transportation business C.the management of marine transportation business D.the vessels and ships The author implies that ______ ．A.even by making use of modern instrument it is difficult to maintain safety in this area B.mariners should take it easy when navigating in this area C.modern instrument should be used to control the safety of navigation in this area D.it is dangerous when navigating in this area The person on the bridge or in the pilot house shall be those ______ ．A.who are recommended B.who are familiar with the navigation，management，operation and safety control C.who are directly involved in the navigation，management，operation and safety control D.who have nothing to do with the navigation，management，operation and safety control