A.persistence B.pulse repetition rate C.pulse length D.resolution
A.high pressure system B.low pressure system C.high dew point D.low dew point
A.carrier frequency B.pulse repetition rate C.pulse length D.pulse repetition time
A.the deviation has been offset by the variation B.there is something wrong with the compass C.the compass is being influenced by nearby metals D.there is no deviation on that heading
A.persistence B.pulse repetition rate C.pulse length D.rotation rate
A.at all times B.in the bottom return mode C.in the volume reverberation mode D.only when there is no current
A.one-millionth part of a second B.one-thousandth part of a second C.one-hundredth part of a second D.one-tenth part of a second
A.At B.In C.During D.With
A.Water temperature B.Climatology data C.Speed of advance D.Depth contours
A.Blind sectors B.Sheltered area C.Unseen area D.Unscanable area
