Thread: Vertical Card Compass Interference?
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Old May 18th 19, 05:05 PM posted to rec.aviation.soaring
JS[_5_]
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Default Vertical Card Compass Interference?
On Saturday, May 18, 2019 at 8:32:38 AM UTC-7, Dan Marotta wrote:
Compass?Â* What's that?
Dan, 5J

Reference standard for innacurate instruments.
Jim