JJ-CCR ApS 2017
www.JJ-CCR.com
2017 JJ-CCR ApS – 2.00 / Revision 06
78
In this submenu it is possible to calibrate the compass and set all options
for it.
6.20.21
Compass
(Overview)
Via this menu item you can switch off the compass or change the compass
dial that is visible on the main screen.
6.20.22
Compass View
(Compass)
Setting
Description
Off
If the compass is set to off, then the compass display
does not appear as the first info screen and the “Mark
Compass” menu is not available.
60
o
/ 90
o
/ 120
o
Sets the range of the compass dial that is visible on the
main screen. The actual amount of arc that is shown
on the screen is 60°, so this may seem the most natu-
ral. The 90° or 120° setting can be used to see a wider
range.
Like any magnetic compass, there are some limitations. Understanding these limitations will help ensure
accurate navigation:
•
Metal objects, permanent magnets, and other sources of magnetic interference such as electric motors
should be kept away from the compass. We recommend comparing the compass accuracy to a known
good compass with and without the interfering object in place to see if it has an effect.
•
Being inside or near a shipwreck may also affect the compass heading.
•
Magnetic declination (also called magnetic variation) is the difference between magnetic and True
North. This can be compensated with the true north menu iten. The magnetic declination varies around
the world, so will need to be readjusted when travelling.
