ComNav Commander P2 & P2VS Installation & Operation Installation
Document PN 29010074 V4.1 - 52 -
Heading Rate Stabilizer
Once a suitable location has been selected for the Fluxgate Compass, the optional HRS
should be mounted in close proximity. For best results, it should be located no closer than 40
cm (16”) to, and no farther than 2 m (6’) away from, the compass. And, similar to the
compass, it should be mounted as close as possible to the boat’s centre of pitch and roll
The Heading Rate Stabilizer
must
be mounted horizontally – i.e., sitting flat in both the
fore-aft & athwartships dimensions, when the boat is sitting level in the water. There is no
need to orient it in any specific direction, however.
The Rate Stabilizer is not adversely affected by proximity to ferrous metal, so there is no
minimum distance to the hull or superstructure, engine, radios, and so on.
The HRS case has mounting holes identical to those of the Fluxgate Compass.
Electrical Connection
In Commander P2 systems ordered with a ComNav Fluxgate Compass & the Heading Rate
Stabilizer option, the compass will be one of the plug-style versions (PN 20320007 for the
standard compass, or 20320004 with a heeling coil). Route that cable to the HRS.
Route the cable from the HRS to the location where the SPU will be.
See
Compasses
on page 66
for further details on connecting the Fluxgate Compass to the
HRS, and the HRS cable to the SPU.
45° Compass Transducer
Important! Always keep in mind that the compass is the single most vital part of an
autopilot system. Locating the 45° Compass Transducer properly, particularly on
steel-hulled boats, is essential to ensure proper operation of the autopilot.
Choose a location for the Compass Transducer
12
. For best performance, it should be
mounted parallel to, and as close as possible to, the boat’s fore-aft centreline, and also as
close as possible to the boat’s centre of pitch and roll. This is typically low in the boat, at or
about the waterline, and slightly aft of the centre of the boat.
You must keep the transducer as far away as possible – at least 2m (about 6’) – away from
engines, electric motors, and other magnetic objects.
Holes are provided in the case, to attach the transducer to a bulkhead. It must be mounted
with the correct side up (the label that says “Compass” must be on top), and the arrow should
point to the bow.
Electrical Connection
Route the Compass Transducer cable to the location where the SPU will be.
Excess cable should be coiled up. The cable may be shortened if desired, to avoid excess
coils.
See
Compasses
on page 66 for further details on connecting the cable to the SPU.
Tri-Axis Rate Gyro Compass
Choose a location for the Rate Gyro Compass. For accurate readings, the word “forward” on
the compass must be facing forward and parallel to the boat’s fore-aft centreline. The
compass should also close to level with the waterline for accurate pitch and roll readings.
You must keep the compass as far away as possible – at least 1 metre (about 3’) – from
engines, electric motors, and other magnetic objects.
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This product was discontinued early in 2008, but is still supported on the P Series.
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