Right under the telegraph, there is a small knob. Press that, and you will be able to set a certain speed of your liking.
Oh, and set speed does not equal actual speed. Actual speed depends upon other factors like weather or if you are manouvering. Set speed should be read as speed achieved when going straight ahead on glass-clear water with no wind.
The same concept is used for the other two dials. Press the knob under the bearing dial, and you can manually set rudder angle left or right. The depth dial will change from low depth representation to great depth representation.
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