What is the BEST conductor of electricity（）.

单项选择题The officer in charge of the navigational watch shall not hand over the watch to the relieving officer if（）.

A.there is reason to believe that the latter is not capable of carrying out the watchkeeping duties effectively
B.the ship is fitted with automatic steering
C.there is daylight or darkness
D.at no time shall the bridge be left unattended

单项选择题The Master to prosecute all voyages with the utmost（）and to render customary assistance with the Vessel’s Crew.

A.Fastness
B.Speeding
C.Swiftness
D.Despatch

单项选择题Shipping society approved buoyant work vests are considered to be items of safety equipment and may be worn by members of the crew（）.

A.in lieu of life preservers during fire drills
B.in lieu of life preservers during boat drills
C.in lieu of life preservers during an actual emergency
D.when carrying out duties near a weather deck's edge

单项选择题Prior to each voyage the master of every ship shall ensure that the intended route from the port of departure to（）is planned using adequate and appropriate charts and other nautical publications necessary for the intended voyage.

A.the first port of call
B.any port of call
C.the last port of call
D.the destination

单项选择题Orders of the Master to the officer of the watch which s he must comply with are（）.

A.Night orders
B.Standing orders
C.Commands by master
D.Requirements by master