A.3 times the depth of water B.6 times the depth of water C.10 times the depth of water D.15 times the depth of water
A.Place the wind on the starboard quarter and hold that course B.Place the wind on the port quarter and hold that course C.Place the wind on the port bow and hold that course D.Place the wind on the starboard bow and hold that course
A.low barometric pressure B.high barometric pressure C.falling barometric pressure D.pumping barometric pressure
A.precipitation B.clear，cool weather C.humid，sticky weather D.cool fogs
A.West or northwest B.Northeast C.Southeast D.North
A.wind direction remains steady B.wind speed increases C.barometer falls D.All of the above
A.coming cold weather conditions B.a warm front weather condition C.high pressure conditions D.scattered cumulus clouds
A.apparent wind speed only B.true wind speed and true wind direction C.true wind speed only D.apparent wind speed and true wind direction
A.High pressure B.Low pressure C.Subsurface pressure D.Terrastatic pressure
A.forest fires B.smoke from industrial areas C.dust or sand storms D.water droplets with the relative humidity more than 95%
