Overview
31 tools for navigation and logbook
Organised by task: course correction, variation, ETA, tides, logbook and more.
All tools by area
Navigation, calculators, marine and logbook — with a short description and link to each feature page.
31 tools — sorted by area
Current / set & drift
Course and distance allowing for tidal stream or current.
Learn more →Compass correction
True ↔ magnetic ↔ compass course with variation and deviation.
Learn more →Wind allowance
Leeway allowance from wind strength (Beaufort or knots) and point of sail — result in degrees.
Learn more →Magnetic variation (WMM)
Magnetic variation from the World Magnetic Model 2025.
Learn more →Course conversion
Switch quickly between true, magnetic and compass courses.
Learn more →Deviation table
Create and save a deviation table for your vessel.
Learn more →Apparent Wind
Work out apparent wind from true wind, boat speed and course — and back again.
Learn more →Onboard instruments (beta)
Live values from the boat network over NMEA 0183, Signal K and NMEA 2000 — speed through water, course, wind and depth. Needs a gateway on the onboard Wi-Fi, rolling out gradually.
Learn more →GPS position
Live coordinates with accuracy read-out.
Learn more →One toolbox
No subscription. No ads. Data on device.
Price may differ in the App Store.
Related topics
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On the App Store