Simrad Robertson AP9 Mk3, Instruction Manual, Page: 137 / 202

Installation
20169223D
5-47
Note !
When NAV mode has been selected, the following display picture will be
shown instead of AUTOTRIM.
* NAV MODE ONLY
This display picture is for checking the
Nav. performance.
N = Autopilot in NAV mode.
XTE = ID for first figure; XTE in meters.
(If vessel is alongside and this value has big
variations, check GPS and DGPS.)
P = ID for second figure; the effect from
NAV GAIN to bring the vessel back on track.
I = ID for third figure; the effect of NAV TRIM
to bring the vessel back on track.
N XTE, P, I, X.X m
1.5 P 0.6