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Glossary
cavitation
The formation of bubbles, which may negatively impact a
transducer's readings by reducing its ability to put energy into
the water.
deadrise
The rise of the bottom of a vessel above a horizontal line at the
center of the vessel; that is, the slope of the hull away from the
horizontal.
echo sounder
An instrument that uses sound waves to measure the depth of
a body of water or an object (such as a school of fish) below the
water's surface.
fairing block
A block used to create a horizontal surface for mounting a
thru-hull transducer when the vessel's deadrise is more than 5
degrees.
transducer
The device mounted through the hull to send and receive
ultrasonic beams that determine seabed conditions and locate
fish. Essentially, a transducer is an energy converter, which
changes electricity to sound (send) and sound to electricity
(receive).
490 INSTALLATION MANUAL, Revision B2
Page 31
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