A.considered B.insured C.relied upon D.suspected
A.is decreased B.decreased C.decreases D.are decreased
A.on an even keel B.listing about 1° to the side the light is displayed on C.listing over 5° With the light displayed on the high side D.listing，and the chutes should be directed to the side where the light is displayed
A.very rare B.common C.often D.reasonable
A.found in the center(s) of the compass rose(s) B.indicated by isogonic lines C.found in a note on the chart D.All of the above
A.Snowfall or blowing snow B.Lack of ability to estimate distance C.Harsh contrast between sun-illuminated snow cover and the background D.Hazy horizons with extensive mirage effects
A.a vessel arrives at a port in a evening B.a vessel leaves a port in a evening C.a vessel arrives at a port in a morning D.a vessel leaves a port in a morning
A.Isothermal B.Millibars C.Isobars D.Seismics
A.spring line B.bow line C.stern line D.breast line
A.fix B.dead-reckoning position C.running fix D.probable position
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