According to Annex I of MARPOL 73/78, the instantaneous discharging rate of the oily waste from cargo tanks of oil tankers must be lower than（）

单项选择题According to Annex I of MARPOL 73 78, oily waste from cargo tanks of oil tankers can be discharged when the ship is more than（）away from the nearest land.

A.50 nautical miles
B.30 nautical miles
C.15 nautical miles
D.12 nautical miles

单项选择题The MARPOL Convention is the main international convention（）

A.about marine pollution prevention
B.covering marine protection of life
C.about marine
D.about ship and port security

单项选择题At an unsheltered anchorage the chief engineer officer shall consult with the master whetheror not to maintain an underway watch“An underway watch” means（）

A.a watch which is kept with lower standard
B.a watch which is kept when the ship isnt sailing
C.a watch which is kept when the ship is sailing
D.a watch which is kept when the ship is in a restricted visibility area

单项选择题When the engine room is put in standby condition, the engineer in charge of the watch need not to（）

A.ensure all machinery which may be used during maneuvering is in ready
B.ensure an adequate reserve of power is available for steering gear and other requirements
C.keep the main propulsion unit controls continuously attended when in the manual mode of operation
D.ensure all machinery which may be used during maneuvering is running stably

单项选择题The responsibilities of the engineer officer in charge of the watch do not include （）

A.to ensure the main propulsion plant are kept under constant surveillance
B.to ensure the auxiliary systems are kept under constant surveillance
C.to inspect the steering gear spaces at suitable intervals
D.to inspect and overhaul the equipments in his charge