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depth finderclick to hear

Device that uses a sonic pulse to measure the depth of water below the boat.
depth finder alarm threshold setting alarm threshold display button gain control on-off switch sound alarm housing dial-type display depth scale echo sounder probe transmission cable plug transducer

alarm threshold setting click to hear

Knob for setting the maximum depth considered to be dangerous.

alarm threshold display button click to hear

Button that is pushed to display the alarm threshold value.

gain control click to hear

Knob for adjusting the amplification of the signal.

on-off switch click to hear

Button for activating the sounder and for selecting the scale.

sound alarm click to hear

Audible signal activated when the alarm threshold is reached.

housing click to hear

dial-type display click to hear

Display surface where an illuminated dot appears at the point on the scale that corresponds to the depth.

depth scale click to hear

Line graduated in feet or meters for reading the distance to the bottom.

echo sounder probe click to hear

Part of the sounder that is submerged to send the ultrasound to the bottom; it receives the echo and converts it into sound.

transmission cable click to hear

Electric wire that relays the electric signals between the housing and the echo sounder probe.

plug click to hear

Metal prong that plugs into the housing.

transducer click to hear

Part of the echo sounder probe that emits the ultrasound and receives its echoes.