1. The instrument wherein bearing or direction can be
determined by radio waves is
a. Sonar
b. Radar c.Fish finder. d.Radio direction finder
2.An instrument which is used to determine the depth of the
water
a. Sonar
b. Radar c.Fish finder. d.Echo-sounder
3. An object on the surface of the water can be detected by
an instrument called
a. Radar. b.Sonar. c.Fish finder d.Radio direction finder
4.The most important instrument used by navigator is
a. Radar
b. Sonar. c. fish finder. d.Chronometer
5. An instrument that calculates the ship's position from
celestial observation is
a. Chronometer. b. Barometer. c. Radar. d. Sonar
6. When a student wants to find how deep the body of water
is, he should use
a. Chronometer. b. Fish finderc. Echo-sounderd. Sonar​