Raymarine DownVision CPT-70, Installation Instructions Manual

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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.
D12952-1
1 2
3
5
4
6
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-
ment hull Displacement hull — mount
approximately 1/3 of the way along
the length of the hull, measured along the
waterline
5 Keel
sailboat Fin keel — mount forward of the keel,
ensuring that the keel will not obstruct the
transducers wide beam width
6 Keel
sailboat
Full keel
— mount away from the keel
at a location 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
2
4
3
D 12636-1
1 Step
2 Rib
3 Row of rivets
4 Strake
• The transducer must be installed in the correct
orientation, as identified on the deadrise / fairing
block.
• 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.
Planning the installation
17