價格：免費
更新日期：2019-06-16
檔案大小：3.3 MB
目前版本：3.2
版本需求：系統需求：iOS 9.0 或以後版本。相容裝置：iPhone、iPad、iPod touch。
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
支援平台：iPhone, iPad