Operating manual ALPHASEAPILOT MFC Issue 1.1 Page 60 of 84
ALPHASEAPILOT MFC
2.32 Setting Rate of Turn Control
(i) RATE OF TURN (ROT) is internally calculated by the Autopilot system and does not
rely on data input from external transducers although it should be noted that the
internally set Rate of Turn value can be overridden by a Type Approved Track
Control system via the complex $HTC sentence.
NB. The operational ROT (deg/sec or deg/min) is programmed within the Autopilot
via the LIMITS Menu (section 1.9) and can be overruled by Track command but
absolute MAXIMUM Safe Rate of Turn can also be set via the SET UP Menu and is
unaffected by Track data. (See Section 2.33).
a) TO SET RATE OF TURN (Operational):-
Once Rate of Turn mode has been selected and set, any turns or heading changes
ordered will be limited to the °/sec or °/min level set and any attempt to increase the
operational value will be ultimately limited by the absolute safe maximum ROT
programmed. (Section 2.33).
The Control Unit display continuously shows ACTUAL and SET ROT thus current operational
values are always available provided:-
ROT Mode selected (vs Radius) via CONTROLS Menu (Sect. 2.4 (vi)).
Deg/Sec or Deg/Min units selected via SET UP Menu (Sect. 2.6 (v)).
REQUIRED OPERATIONAL ROT:-
(i) Use the “LIMITS” key to enter the Limits
Menu.