Archived App
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
Use your iPhone/iPod/iPad on its edge, as a Hand Bearing Compass.
Press the screen to take a sight.
After 3 sights, go to the chart table !
The Magnetic variation is calculated, depending of your position, using the WMM algorithm and data.
Notes :
To save battery life, position is refreshed with an accuracy of 1NM.
Bearings are displayed in Magnetic (M). You have to apply Magnetic
Variation to determine the True North (T).
References :
- WORLD MAGNETIC MODEL : http://www.ngdc.noaa.gov/geomag/WMM/DoDWMM.shtml
- Moon Calculations : ELP2000 theory
- Jean Meeus. Astronomical Algorithms
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What's New in Hand Bearing Compass
4.0
September 8, 2020
New method for taking a sight using the direct view with the camera.
