36 | Installation Instructions
1.7.6 Adjusting True Heading
After the AlphaMidiCourse Mk2 has settled the gyrocompass can be calibrated against an external reference
for example:
• A known target
• An astronomical observation
• Heading of the pier or quay the vessel is moored to
• Fixed point on the chart
The observation period for the heading difference should be as long as possible. If there is any difference between the
gyro bearing and the confirmed external reference that cannot be correct by adjusting the mechanical location of its
maters compass, an offset value may be inserted.
This value is entered by using its Extension Menu as following:
1.
Activated Extension Menu by pressing and hold the
SET
and
ACK/ENT
buttons simultaneously for at least 3
seconds. Main category
A-1
will be displayed.
2.
Press the DISP button once to display main category
A-2
.
3.
Press the SET button to enter the sub-category
2.1.o.
4.
5.
Use the ▲
or ▼ buttons to increase or decrease the offset parameter value.
Below the heading is 326.4° and will be corrected with -/+ 2.5°.
See example:
6.
Confirm the new value by pressing the
ACK/ENT
button or reject the changes by pressing the
SET
button.
Display will return to sub-category
2.1.o.
7.
Exit the Extension Menu by pressing and holding the
SET
and
ACK/ENT
buttons simultaneously for at least 3
seconds.
➔
Result
Correction of +2.5°
Correction of -2.5°
➔
Result
Summary of Contents for ALPHAMIDICOURSE Mk2
Page 80: ...80 Appendices 6 1 1 Dimensions of Control Unit...
Page 81: ...81 Appendices 6 1 2 Dimensions of Master Compass...
Page 82: ...82 Appendices 6 1 3 Master Compass without housing...
Page 84: ...84 Appendices 6 1 5 Connection Diagram...
Page 85: ...75 Appendices 6 1 6 Cable Diagram...
Page 86: ...76 Appendices 6 1 7 Installation Drawing...
Page 88: ...78 Appendices AlphaMidiCourse Mk2 Check Maintenance Sheet...
Page 89: ...79 Appendices AlphaMidiCourse Mk2 Check Maintenance Sheet...
Page 90: ...80 Appendices AlphaMidiCourse Mk2 Check Maintenance Sheet...
Page 91: ...81 Appendices AlphaMidiCourse Mk2 Check Maintenance Sheet...
Page 92: ...82 Appendices AlphaMidiCourse Mk2 Check Maintenance Sheet...
Page 95: ...85 Appendices 6 4 Return Slip Sensitive element...
Page 96: ...86 Appendices...
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