ComNav P4 Installation and Operation System Overview
Document PN 29010100 V1r0 - 35 -
Other Compasses
For the very best performance of the P4 Advanced Autopilot system, ComNav recommends
the use of their own branded compasses– but you certainly may decide to use either a
fluxgate compass or a magnetic compass from another manufacturer. See your ComNav
Dealer or consult the factory for information on interfacing these compasses with the P4
system.
Rudder Followers
Standard Rotary Rudder Follower and Rudder Linkage
PN 20330008 and 20330007
The ComNav P4 is normally supplied with a ComNav Medium Duty Rotary Rudder Follower.
The Rudder Follower is used to transmit the position of the vessel’s rudder to the SPU. It
should be connected to the part of the steering system that the autopilot controls. Normally, it
would be the vessel’s rudder. However, if the vessel has two-stage steering, where the
autopilot drives a control or servo ram, the Rudder Follower should be mounted to the servo
ram rather than the rudder.
Figure 12 – Rotary Rudder Follower
Heavy Duty Rotary Rudder Follower
PN 20330012
A Heavy Duty Rotary Rudder Follower is available for special applications. Check with your
ComNav Dealer to determine whether this product is suitable for your application. Separate
installation instructions are provided with this Rudder Follower.
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