Installing The Echo Sounder Transducer - NASA Marine Clipper duet Manual

INSTALLING THE ECHO SOUNDER TRANSDUCER

The transducer can be mounted in one of three ways:
(i) The transducer face can be bonded directly to the inside of
the hull. (Some energy is lost to the hull but the loss in
performance is, for most G.R.P hulls, hardly noticeable).
(ii) A through hull mount is available from your dealer.
(iii)
The transducer can be positioned inside a G.R.P . Hull by
means of an In Hull Transducer Kit.
The latter method of installation offers the advantage that the
transducer can easily be removed for examination or
installation elsewhere. It should be mentioned however, that
although the accuracy will in no way be affected by installing
the transducer inside the hull, the maximum range sensitivity
may be reduced, depending on the thickness and quality of the
glass fibre. The In Hull Kit is available direct from NASA Marine
or your local chandler.
Whichever method is selected, the best location still has to be
found.
Select a position below the water level where the transducer
will point substantially vertically downwards towards the
seabed, and where the transducer and its cable (do NOT
shorten the transducer cable) will be well clear of equipment
which might be a source of interference. Such sources might
include the engine ignition and starting systems, alternators
and dynamos, electric pumps, etc. The position should also
be well clear of large masses of bubbles or cavitation near
propellers or sudden changes in hull profile which could
disrupt the signal.
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