Raymarine E70141, Installation And Operation Instruction Manual, Page: 26 / 70

5.4 Selecting a transducer location
General speed and depth transducer location
requirements
When selecting a location for your transducer it is important to
consider a number of factors.
The transducer should be mounted within the clear water flow areas
indicated by the shaded areas in the image below.
D 4349-2
1
2
3
1 Sailing vessel
2 Planing power vessel
3 Displacement power vessel
Each transducer should also:
• Be ahead of the propellers (by a minimum of 10% of the water
line length).
• Be at least 150 mm (6 in) away from the keel (ideally ahead of the
keel on a sailing yacht).
• Be as near as possible to the center line of the vessel.
• Be clear of other through-hull fittings or projections.
• Have sufficient clearance inside the hull to fit the nut.
• Have 100 mm (4 in) of headroom to allow for withdrawal.
Note: In addition to the above requirements, the depth transducer
must be mounted within 10º of the vertical.
Speed and depth transducer mounting
Ensure transducers are installed in accordance with the instructions
supplied with the transducer.
Rotavecta transducer mounting
The rotavecta transducer can be mounted on a flat surface or rail
mounted.
Using the rail clamp
1 Clamp screws.
2 Gasket.
3 Adaptor pieces.
4 Grub screw.
5 Rail diameter 23 mm (0.9 in) or more.
If less than 25 mm (1.0 in), use
adaptor pieces.
6 Rail diameter 25 mm (1.0 in). Do NOT
use adaptor pieces.
Wind vane transducer / rotavecta location
requirements
When selecting a location for your wind transducer it is important
to consider a number of factors.
The transducer's location must:
• Allow reasonable access for installation and servicing.
• Be as high as possible and away from any equipment which may
shield the transducer or otherwise disturb the air flow.
• Provide a horizontal mounting surface. If a surface (e.g. mast
top) is otherwise suitable but not horizontal, make up a suitable
wedged packing piece to provide the necessary horizontal
surface.
• There must also be a viable route for the transducer cable to be
routed to the instrument display.
Wind vane transducer and rotavecta mounting
Ensure that the wind transducer or rotavecta is installed in
accordance with the instructions supplied with the unit.
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