Vetus COMBI4 Manual De Manejo Y Instrucciones De Instalación página 24

• The sensor must be continuously
immersed in water.
• The transducer beam must be unob-
structed by the keel or propeller
shaft(s).
• Choose a location away from interfer-
ence caused by power and radiation
sources such as: the propeller(s) and
shaft(s), other machinery, other echo
sounders, and other cables. The lower
the noise level, the higher the echo
sounder gain setting that can be used.
• Choose a location with a minimum
dead rise angle, so the transducer
beam will be aimed at the bottom.
• Choose an accessible spot inside the
vessel with adequate headroom for the
height of the housing, tightening the
nuts, and removing the insert. Allow a
minimum of 280 mm (11").
Hull types, and best location for sensor
• Displacement hull powerboats —
Locate amidships near the centreline.
The starboard side of the hull where the
propeller blades are moving downward
is preferred.
• Planing hull powerboats Mount well
aft, on or near the centreline, and well
inboard of the first set of lifting strakes
to insure that the sensor will be in con-
tact with the water at high speeds. The
starboard side of the hull where the
propeller blades are moving downward
is preferred.
Outboard and I/O — Mount just for-
ward of the engine(s).
Inboard — Mount well ahead of the
propeller(s) and shaft(s).
Stepped hull — Mount just ahead of
the first step.
Boat capable of speeds above 25
knots — Review the installation loca-
tion and operating results of similar
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Best location for sensor
1 Large displacement hull
2 Small displacemnets hull
 Planing hull, outboard and I/O
4 Stepped planing hull
5 Fin keel sailboat
6 Full keel sailboat
boats before proceeding.
• Fin keel sailboats — Mount on or as
close as possible to the centreline and
forward of the fin keel 00 – 600 mm
(1–2').
• Full keel sailboats — Locate amid-
ships and away from the keel at the
point of minimum dead rise.
COMBI 4