Mounting The Equipment; Hull Unit - Furuno FSV-30 Installation Manual

1. MOUNTING THE EQUIPMENT

1.1 Hull Unit

Note 1: The raise/lower control box on the hull unit contains a motion sensor. Therefore,
never drop the hull unit.
Note 2: Handle the transducer carefully. Shock will damage its sensitive components.
1.1.1 Mounting considerations
Decide the location of the hull unit through consultation with the dockyard and ship owner.
When deciding the location, the following points should be taken into account.
• Choose an area where propeller noise, cruising noise, air bubbles and interference from
turbulence are at a minimum. Generally, the point at 1/3 to 1/2 of the ship's length from
the bow on or near the keel is optimum. On-the-keel installation is advantageous for
minimizing oil consumption in comparison with off-the-keel. If the hull unit can not be
installed on the keel, the center of the retraction tank should be within 600 mm of the keel
to prevent a rolling effect. For large ship with deep draft, the hull unit can be installed at
the bow.
• Choose a place where the hull bottom is flat and the draft is sufficiently deep. Normally,
the transducer should protrude at least 500 mm beyond the keel to minimize the effect of
air foam and bubbles.
• Choose a place where interference from other transducers is minimal. The hull unit
should be at least 2.5 m away from the transducers of other equipment.
NOTICE
Do not apply paint, anti-corrosive sealant
or contact spray to coating or plastic
parts of the equipment.
Those items contain organic solvents that
can damage coating and plastic parts,
especially plastic connectors.
1/3
1/2
Hull unit mounting location
Within 600 meter
1-1