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Title: Compass Conflict
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GPSNavX
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Posts: 1,947
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#4
July 17, 2010 22:10
HDG: = Heading
COG: = Course Over Ground

If HDG: is disabled, then COG: is used for the compass banner and HDG: is not displayed in the Instruments. COG: does not provide any error (other than HPE: horizontal position error) and hence the compass band would not be yellow.

HDG: uses the magnetic compass in the iPhone or iPad, where COG: uses the GPS in the iPhone 3G/3Gs/4 or iPad 3G. In order for COG to be calculated accurately: one must be underway. Where HDG: is dependent on how the device is oriented independent of motion.

http://support.apple.com/kb/TS2767
Scott Dillon
Sydney Australia
North Shore 38
CYCA
 
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Messages In This Thread
[No subject] - by - July 17, 2010 14:25
[No subject] - by - July 17, 2010 20:06
[No subject] - by - July 17, 2010 21:57
[No subject] - by - July 17, 2010 22:10
[No subject] - by - July 18, 2010 00:00
[No subject] - by - July 18, 2010 09:27
[No subject] - by - July 18, 2010 12:13
[No subject] - by - July 18, 2010 16:30
[No subject] - by - August 15, 2010 13:43

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