Installation of the Depth Sounder
The echo sounder unit must be installed in a turbulence-free zone in the
hull. It should be mounted vertically.
Do not install the sending unit close to external valves,
anodes, log sending units, etc. to avoid influences by tur-
bulence.
Measure the distance between echo sounder and keel
bottom and record this value. You will need it later on for
the basic setting.
On sailing boats the installation should always be made directly in front
of the keel, as close to the longitudinal axis as possible. On boats with a
long keel the installation should be at the end of the first third of the hull,
but not at the widest location of the hull.
A vertical installation of the echo sounder is especially important for sai-
ling boats. If the installation is not vertical, it may be impossible to mea-
sure the depth, due to heeling of the ship.
Installation on sailing boats:
Echo sounder
On powerboats the sending unit should be installed at about the begin-
ning of the last third of the hull, never towards the stern, or in a zone of
strong turbulence or up front, where strong disturbances by air introduc-
tion must be expected.
An ideal installation is near the longitudinal axis of the ship and in the
zone of the first stringer directly in front of the engine compartment, if
possible. At higher speed this is the only location where a disturbance-
free echo sounder operation can be expected.
The deviation from the vertical should not exceed 10 degrees, but mea-
surements may not be available at high speed, in tight curves and in
deep water.
INSTALLATION
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