ComNav P4 Installation and Operation System Overview
Document PN 29010100 V1r0 - 27 -
System Overview
This chapter provides a brief description of the major elements of the P4 Advanced Autopilot
System, its functions, and their relationships to each other.
Figure 3 shows a block diagram of a typical example of the P4 system, showing the
interconnections between the elements of the system:
• The Signal Processor Unit (SPU)
• The Main Control Head
• A Compass or other Heading Sensor
• Solenoid(s), Reversing Motor, or Cable Drive, which move the Rudder
• The Rudder Feedback Unit
• Optional Auxiliary Control Head(s) and Remote Controls
• Various optional accessories and external equipment
• Other Navigation equipment
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