Which part of the fathometer is typically mounted above the low point of the hull?

The transducer is the component of the fathometer that is typically mounted above the low point of the hull. It is responsible for emitting sound waves into the water and receiving the echoes that bounce back from the seabed or objects below the vessel. The location of the transducer is crucial for accurately measuring water depth, as it needs to be positioned where it can effectively send and receive these signals without interference.

Mounting the transducer above the low point of the hull ensures it minimizes obstructions and allows for better transmission of sound waves. If the transducer were lower than the hull's lowest point, its performance may be compromised by turbulence or other factors caused by the hull's movement through the water.

The receiver, float, and indicator serve different functions in the fathometer system and do not require specific positioning in relation to the hull's low point for proper operation. The receiver processes the signals received from the transducer, the float may be part of other types of measuring equipment, and the indicator is the output device showing the depth measurements. Each of these components plays an essential role in the fathometer system but does not have the same spatial requirements as the transducer.