Location Requirements - Raymarine DownVision CPT-70 Installation Instructions Manual

3.7 Location requirements

The guidelines below should be followed when selecting a
location for your transducer.
For best performance the transducer should be installed in a
location with the least turbulence and aeration.
Important: Do NOT install the transducer in-line with trailer
rollers, your vessel's engine intake or discharge openings.
• The transducer should be installed as close to the centerline
of the vessel as possible.
1 Planing hull Outboard or I/O — mount forward and to the side
of the propeller(s)
2 Planing hull Inboard — mount forward of the propeller(s) and
shaft(s)
3 Planing hull Stepped hull — mount on the first step as far aft
as possible
4 Displace- Displacement hull — mount approximately 1/3 of
ment hull the way along the length of the hull, measured along
the waterline
5 Keel Fin keel — mount forward of the keel, ensuring that
sailboat
the keel will not obstruct the transducers wide beam
width
6 Keel Full keel — mount away from the keel at a location
sailboat with minimum dead rise, ensuring that the keel will
not obstruct the transducers wide beam width
• The transducer should be installed away from any protrusions
such as transducers, steps, ribs, strakes, or rows of rivets.
1 Step
2 Rib
3 Row of rivets
4 Strake
• The transducer must be installed in the correct orientation.
Planning the installation
1 Vessel hull
2 Side view of transducer
3 Bottom view of transducer
4 Direction of bow
5
Direction of stern
• The transducer should be installed in a location where there
is sufficient clearance inside the hull to fit the nut and have at
least 100 mm (4 in) of headroom to allow for withdrawal.
• The transducer should be installed so that the bottom face of
the transducer is pointing straight down.
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