Operating manual ALPHASEAPILOT MFC Issue 1.1 Page 41 of 84
ALPHASEAPILOT MFC
2.12 The Rotary SET COURSE Control
The rotary Course Selector produces permanent course change orders when turned
anticlockwise (Port) or clockwise (Stbd). Course changes up to a maximum of 359° can be
ordered when it should be noted that the Autopilot system will turn the vessel in the direction of
Course Selector rotation even if this is “the long way around”.
Typically, course changes will be much less than 359° and the smallest incremental change that
can be “felt” by hand and seen/confirmed by SET COURSE display indication is 0.5°.
Single step rotation will produce 0.5° step changes in Set Course and, if the Course Selector is
continuously turned, the step change values will increase as follows:-
• First 6 clicks in 0.5° step changes.
• Second 6 clicks in 1° step changes.
• Next 6 clicks in 5° step changes.
• Thereafter in 10° steps.
In this manner, prolonged rotation of the Course Selector produces large course change orders
which would otherwise require many turns geared to a fixed 0.5° per step.
NB. Course changes ordered by the rotary SET COURSE Control are always displayed in the
SET COURSE area of the display and will be shown as a flashing “NEW COURSE” value if
“CONFIRM” key operation is required to turn to the new heading.
A SET COURSE alarm is programmable between the limits 10° to 90° in 5° steps via the SET
UP Menu which, dependent on level set, produces an audible warning when a new course is
requested by Course Selector rotation.
“CONFIRM” key operation will initiate turn to the new heading and “CANCEL” key operation
will abort the new course request.
If neither key is used within a programmable timeout period after the Course Selector is turned,
the new course request will be automatically cancelled.
A NEW COURSE TIMEOUT PERIOD programmable between the limits 20 to 60 seconds is
available via access to the SET UP Menu.
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