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Installation
Physical Installation
Processor
The WTP3 unit should be installed in a dry place with easy accessibility. The enclosure is water resistant to IP67
but will not survive prolonged immersion.
The engine box is NOT a good place to install your instrument system processors; it is hot and electrically noisy.
The WTP3 unit does not contain orientation sensitive components so it is NOT necessary to mount the unit
vertically, however it is recommended to orientate the unit with all cable exits downwards.
Rate Gyro Box
The Rate Gyro box should be orientated as carefully as possible along the fore and aft axis of the yacht and in the
horizontal, with the cable gland facing forwards, as indicated by the arrows. If you do not x it down initially you
will be able to check that the wiring is correct by rotating the box along the fore and aft and athwartships axes
and seeing that the roll, pitch and yaw rate values are updated correctly. These rate values are displayed in the
‘PARAMETR’ menu by default.
Pitch is taken to be positive when the top of the mast is swinging forwards; roll is taken to be positive when the
top of the mast is rolling from starboard to port; yaw is taken to be positive when the boat is moving in an anti-
clockwise direction (i.e. turning to port).
Heel
Heel should read positive on starboard tack (i.e. with the boat heeling to port).
The Heel sensor (B&G part 690-00-004) should be installed on an aft facing bulkhead.
Fastnet Network Installation
General Layout
The Fastnet network cabling should be such that the network cable run is predominantly in a linear layout
with a denite start point and end point (which are terminated. “Star” shaped layouts are inecient, may cause
incorrect operation and should be avoided.
