NT888G MK2 AUTOPILOT OPERATING MANUAL
2.4 The CONTROLS Menu / Turn Type(ROT/RAD Selection) … (Continued).
Rate of Turn Operating Note:-
Rate of Turn (ROT) is reliant upon Autopilot system internal calculation based on
change of heading and does not require Speed input although it must be noted
that Speed through the water (STW) is essential for Speed Adaptive Autopilot
operation.
NO STW DATA = NO SPEED ADAPTIVE AUTOPILOT OPERATION.
ROT or RAD Control Selection:-
Under normal operating conditions, it is only possible to select one or other (ROT
or RAD) control type (as preferred) although it should be noted that both types –
and their internally set Autopilot values – can be overruled if/when the Autopilot is
used in the “TRACK” mode with a Track Control System (TCS) that provides
comprehensive Track data via the $xxHTC sentence. (Section 2.9 & 2.38 refers).
Rate (ROT) or Radius (RAD) control type is selected via the CONTROLS
Menu as follows:-
a)
Use the “
CONTROLS
” key to enter the Controls Menu.
b)
Use the “
CONTROLS
” key again to select “
TURN TYPE
” box followed
by flashing “
ROT
” or “
RAD
”.
c)
Use the rotary (+/-) illum. control to set as required (ROT, RAD or
OFF).
See Sections 2.6 (v) & (vi) for ROT & RAD calibration respectively.
2.5 The Rotary (+/-) Illumination Control.
This is a dual function device used as a dimmer control for the Autopilot Control
Unit keypad LEDs and display backlight illumination level and, also, for parameter
state/value adjustment when any of the Autopilot Menus are accessed.
Dimmer Function:-
When fully anticlockwise, all signal LED’s are at
maximum brilliance. All other legends are unlit.
When the control is rotated clockwise, the LED’s dim
and then increase in brilliance at the same rate as the
control panel legends. In this manner all aspects can
be unobtrusively illuminated in all conditions.
