Marine Digital Compass
If your device exposes a compass sensor, it is used. Otherwise we fall back to GPS course over ground (only valid while underway).
Digital Compass
OfflineNESW
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No signal
Compass unavailable — GPS only gives heading while moving (> 0.5 kt).
Uses your phone's magnetometer for live heading at rest. Real sensor data only — no synthetic heading.
Heading
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Source
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GPS COG
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Speed
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⚠ Planning Assistance Only — Not a Certified Navigation System
Always verify with official charts, onboard instruments, marina staff, NOAA/NWS, USCG, and professional navigation equipment.
