Doppler Log and Emlog Flashcard

What is the primary principle behind the Doppler log?

What frequency range is typically used in Doppler logs for underwater applications?

Which parameter does the Doppler log directly measure? Options: Absolute speed, Relative speed to water or ground, Wind speed, Water current speed

In a Doppler log system, the term 'transducer' refers to the device that:

A Doppler log measures speed over the ground by sending signals in which direction(s)?
Options: Forward, Downward, Aft, Forward and aft

What happens to the frequency of the signal when the vessel is moving toward the signal source?

Which physical principle does a Doppler log utilize to calculate speed?

Which part of the Doppler log system emits the ultrasonic signals? Options: Receiver, Sensor, Oscillator, Transducer

What is a key limitation of a Doppler log when measuring speed over ground in shallow water?

How does the angle of signal transmission affect accuracy in a Doppler log?