ComNav P4 - Multiple Control Heads and Auxiliary Controller; Station Lock;Unlock; Figure 83 - Station Lock Icons on Main (Left) and AUX Control Head (Right)

ComNav P4 Installation and Operation Advanced Operations
Document PN 29010100 V1r0 - 162 -
Multiple Control Heads and Auxiliary Controllers
Two additional Control Heads or Auxiliary Controllers may be added to the standard P4
system. These may be any combination of Control Heads, CR-203 Handheld Remotes, or
TS-203 Fixed Remotes.
Only one Control Head or Auxiliary Controller may be In-command at any given time. When
the autopilot system is first powered on, the main Control Head, connected to J11 of the
SPU, will always be In-command.
The other Control Heads and/or Auxiliary Controllers are said to be Repeaters. As a
Repeater, the unit simply repeats the display information from the In-command unit, but does
not affect the operation of the autopilot. You can always tell whether a particular controller is
a Repeater because it will display a large letter “R” in the upper right corner of the display.
Command can be transferred from an In-command controller to a Repeater. To do so, press
and hold the PORT and STARBOARD ARROW buttons on the repeater until the audible
alarm beeps and the letter R disappears. The Repeater now becomes the In-command
controller, while the previous controller becomes a Repeater.
Station Lock/Unlock
Setting the Station Lock parameter in the Standby menu to Lock prevents any of the
Repeaters from being able to take command. When station lock is set to Lock, the image of a
key will be shown in the upper right corner of the display, next to the repeater R.
The key image will either be outlined or filled-in, depending on whether the station lock is for
the main Control Head or an Auxiliary.
Figure 83 – Station Lock Icons on Main (left)
and Aux. Control Head, when In-command (right)
The controller In-command shows an outline key icon. The outline key signifies that all
stations, except for the main Control Head and the controller which is currently In-command,
are locked out.
Controllers that are Repeaters, except for the main Control head, will show the solid key icon,
indicating that they are locked out and cannot take command.