NT888G MK2 AUTOPILOT OPERATING MANUAL
1.10 Programmable Automatic Radius of Turn (Section 2.6 & 2.34) … (Continued).
(vi)
Use the rotary (+/-) illumination control to select the required Radius of
Turn between the limits 0.1–9.9Nm.
1.11 Adjusting Overshoot and Undershoot (Section 2.4 & 2.24).
This performance aspect is based on Counter Rudder Control settings and, if
operating in the full Adaptive mode, is unlikely to require manual adjustment.
If manual adjustment is required (more likely in the non Adaptive PID mode) the
“COUNTER”
Rudder value is changed as follows:-
(i)
Use the “
CONTROLS
”
key to display the controls menu.
(ii)
Use the “
CONTROLS
” key again to select “
COUNTER
” and increase or
decrease the value (1-9) using the rotary (+/-) illum. key based on the
following:-
To adjust overshoot (vessel goes past new heading) or undershoot (vessel stops
short of new heading) when altering course using the Autopilot: -
If vessel overshoots - increase COUNTER RUDDER value.
If vessel undershoots - reduce COUNTER RUDDER value.
1.12 Using the Track Function (Section 2.9 & 2.38).
The Autopilot is equipped with a comprehensive Track Steering facility which is
activated by operation of the “
TRACK
” key provided the Autopilot System is engaged
(ON)
and suitable Track data is available from a proprietary approved GPS/Track
Control system/ECDIS etc.
Track Operation is confirmed by
corner LED illumination of the Track
key and additional display information
for TRACK Steering Mode.
Three Track sentence types are
accepted ($XXHTC, $XXHSC,
$XXAPB) all three of which provide
the “Heading to Steer” data required
for single or multi waypoint route
steering by the Autopilot system.
When operating in conjunction with an approved Track Control system sending the
comprehensive “HTC” sentence, complex manoeuvres based on externally ordered
ROT & Radius controlled turns to new headings can be acknowledged and executed
by the Autopilot.
