Operating manual ALPHASEAPILOT MFC Issue 1.1 Page 34 of 84
ALPHASEAPILOT MFC
2.6 (IV) Watch Alarm
The built in Autopilot Watch Alarm can be set to provide an audible and visual alarm level at
operator selectable intervals from 3 to 12 minutes in one minute steps - or may be switched
OFF if the facility is not required.
At the end of the time interval selected (3 to 12 mins) the Control Unit alarm will sound and
is cancelled by single operation of the TEST/OFF keypad. A new timing period will
automatically commence.
If the Control Unit alarm is not cancelled (after the initial time interval) within a further one
minute period, a relay within the Autopilot Distribution Unit provides volt free contacts to
activate an auxiliary (external) alarm if fitted.
To set the Watch Alarm time interval (OFF or 3 to 12 mins.):-
a) Use the “LIMITS” key to enter the Limits Menu.
b) Use the “LIMITS” key again to select “WATCH” box followed by flashing current
value (OFF or 3 to 12).
c) Use the rotary (+/-) illum. control to set the required condition.
2.6 (V) Rate of Turn (ROT) Calibration & Display (°/sec or °/min)
The required ROT operational parameters must be entered into both the Autopilot SET UP
and LIMITS Menus to specify maximum permissible safe Rate of Turn and normal operating
Rate of Turn respectively.
Max. Permissible Safe Rate of Turn & Display Mode (°/min or °/sec):-
It should be noted, that a maximum permissible safe Rate of Turn can – and should for
safety reasons – be entered into the Autopilot SET UP Menu (on Masters advice) during
installation.
This maximum level will be the absolute maximum allowed by the Autopilot even if a higher
ROT is later ordered by the operator or by a Track Control system (and which, in either
case, will result in an Autopilot alarm).
To set maximum safe Rate of Turn:-
a) If not already in the Set Up Table, simultaneously press the “CANCEL” and
“CONFIRM” keys for 5 seconds until the Set Up Table is displayed with a black
cursor highlighting the Set Up parameter currently selected.
b) Rotate the Autopilot Set Course Control to move the cursor to parameter
number 27 (ROT MAXIMUM).
c) Use the rotary (+/-) illum. control to set the maximum safe value of ROT in
°/SEC (0.1-10) or °/MINUTE (6-600).
Normal Operational Rate of Turn or Radius of Turn Setting:-
The required Rate of Turn for normal operational duties – up to the maximum safe Rate of
Turn value stored in the Set Up Menu – can be set (or changed) via the LIMITS Menu.
NB. If ROT has not been selected in the CONTROLS Menu (i.e. RAD Turn Type selected) the
ROT setting in the LIMITS Menu will not respond to cursor selection/adjustment.
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