Working principle of Electromagnetic log ?

What is the principle of EM log?
PRINCIPLE: EM log means electromagnetic log and as the name signifies it works on the principle of. electromagnetic induction.
What is the difference between EM log and Doppler log?
Doppler Log works on the principle of measurement of Doppler shift between. measured and which is proportional to the speed of the flow. this the speed displayed is the speed over ground, whereas, in the EM Log only the speed through water can be calculated.
Where is the EM log transducer located?
The system consists of the EM Log transducer located in the keel and an operational unit on the bridge deck.
What is the basic principle of speed log?
PRINCIPLE OF OPERATION
The Doppler speed log measures ship's speed by using the Doppler Effect, which is observed as a frequency shift resulting from relative motion between a transmitter and receiver or reflector of acoustic or electro- magnetic energy.

[@Dhyutisworldofcooking]

Nice video Ankit.
But what was the need to rush through and end it abruptly,please edit the video properly,it is a very nice one,in the next video please share about how distance travelled is calculated.

[@NavigatewithAnkit]

Ok..