NorthStar 6000i, Quickstart Manual And Reference Manual

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Reference section 6 — Echo sounding
Troubleshooting the echo sounder
Northstar 6000i
Maintaining the transducer
Do not expose a transducer to gasoline or
clean it with strong solvents, as either of
these can penetrate and degrade the
housing. If a transducer will be exposed to
salt water, coat it with anti-fouling paint to
prevent sea growth. To clean a transducer
of sand, debris, or sea growth, use a stiff
brush or putty knife. If necessary, wet-sand
with finer grade wet or dry paper. Use
sanding sparingly, as repeated sanding may
affect a transducer’s performance at high
speeds. Check the transducer periodically.