On an echo sounder, which of these is used to draw a line on the paper to mark a specific time of an occurrence?

All of these are non echo sounder transducer type, except:

What is the frequency of the low frequency pulse of the echo sounder?

Your vessel's heading is 330degspgc and 345degspgc with a 2degE gyro error. If there s a varation of 10degW, what is the deviaton on this heading?

The standard atmospheric pressure is:

What is the length of nautical mile

When relieving the helm, the new helmsman should know the:

How many degrees north or south of the Tropic of Cancer is the Arctic Circle?

Automatic device for steering a vessel by means of control signals received from gyro compass is called:

Which situation requires you to furnish a notice of marine casualty to the coast guard?

Isogonic lines are the lines on chart which do not indicate the following, except:

The visibility of lights indicated in the charts is in nautical miles for:

The reaction of a gyro compass to an applied force known as:

Which chart symbol indicates that the bottom is coral?

When navigating using DGPS, you may expect your position to be accurate to within a radius of how many meters:

The angle between the grid and magnetic meridians is called:

What is the speed of sound in the water? 1 ft = 0.0003048 km

A barometric pressure reading of 29.94 inches of mercury is equivalent to:

What is an error in a gyrocompass caused by rapid changes in course, speed and latitude causing deviation before the gyro can adjust itself?