单项选择题
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.
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（）.
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.