A.horizontal
B.vertical
C.diagonal
D.vertical or diagonal
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A.watch
B.look for
C.see
D.regard
A.west in west longitude and east in east longitude
B.east in west longitude and west in east longitude
C.west
D.east
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.more serious
B.not less serious
C.more dangerous
D.no more dangerous
A.low water slack
B.high water slack
C.high water ebb
D.high water flood
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The distance between any two meridians measured along a parallel of latitude （）.
On a voyage from Halifax,N.S.,to Dakar,West Africa,the Canary Current will （）.
For full information regarding the current circulation of the Indian Ocean,（） Sailing Direction,Current Atlas,etc.
On a voyage from Capetown to London，the favorable ocean current off the coast of Africa is the （）.
Above-normal tides near the center of a hurricane maybe caused by the （）.
Lateral movement of the vessel to leeward of its course defines （）.
During a period of whiteout，you should expect which of the following（）.
A vessel is entering port A for the first time and has a Pilot conning the vessel. The Master is unsure that the Pilot is taking sufficient action to prevent a collision. What should the Master do（）.
Clearance gauges at bridges indicate （）.
A tug is to assist in docking an oceangoing vessel on a hawser. The greatest danger to the tug is （）.