Compass
STD 22
Installation and Service manual
Compass STD 22
101
Edition: July 1, 2005 3646/110 --233.DOC010302
3.4.3.3 Setting the compass zero (reference course)
Once the compass has been installed, it must be aligned according to its installation
location. The compass z ero is set using DIP switch B 37 and buttons B 38 and B 39.
The compass must have been in operation for at least 5 hours before the compass
zero is set.
Button B39
Button B38
DIP switch B37
Display
Button B39
Button B38 B37 DIP switch
Display
E10
Figure 61: DIP switch B37 and buttons B38/B39
The reference course to be set is determined from the ship’s fore-and-aft line
(e.g. take a bearing or obtain the pier course from the sea chart).
This reference course is entered according to the following procedure.
-- Set DIP switch B37 “1” to the “OFF” position.
The digital indicator is now indicating “ALEr” = Alignment Error
-- Press button B38 or button B39 until the heading you require is displayed
(B38 changes the value downwards and B39 changes it upwards).
-- If you hold down the button the speed at which it changes will increase.
Set DIP switch B37 “1” to the “ON” position. This saves the set value in the
compass.
-- After the reference c ourse has been set, read the alignment error
(see next section) (See also Figure 62)
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