航海英语船舶舱室名称单项选择题每日一练(2018.11.14)

单项选择题
Channel 13 is primarily used for ship to ship communication. Channel 13 is also authorized for（）.
A.coast to aircraft operational communications
B.aircraft to ship operational communications
C.lock & bridge communications
D.aircraft to ship navigational communications
单项选择题
According to the Rules，a vessel’s length is her（）.
A.length between the perpendiculars
B.length along the waterline
C.length overall
D.registered length
单项选择题
Chronometer error may be found by（）.
A.radio time signal
B.comparison with a timepiece of known error
C.applying the prevailing chronometer rate to previous readings
D.All of the above
单项选择题
Camphor oil is classified as a（）.
A.Grade A flammable liquid
B.Grade C flammable liquid
C.Grade D combustible liquid
D.Grade E combustible liquid
单项选择题
Considering the general circulation of the atmosphere，the wind system between latitudes 30°N and 60°N is commonly called the（）.
A.prevailing westerlies
B.horse latitudes
C.trade winds
D.subpolar low pressure belts