Marine
Plan tides for the passage — calculator & guidance
Offline tides from harmonic constants (~1,000 stations, focus USA) or live data for Mediterranean, North Sea and worldwide via BYOK.
Tides explained honestly
Not every region has offline stations in the app. For European waters you can use WorldTides with your own key — no subscription with NauticCalc.
Two approaches
- ·Offline: XTide/NOAA harmonics-dwf-free on device
- ·Live: WorldTides API key in the iOS keychain
- ·Combined with ETA and harbour manoeuvre planning
Offline tides
Around 1,000 stations — calculation fully on device. Coverage mainly USA and selected international ports.
Official local sources
For critical manoeuvres, official tables and harbour information still apply.
Frequently asked questions
Offline focus is USA/Pacific. For North Sea/Mediterranean: WorldTides key (free quota often sufficient).
Related topics
Tides at a glance
BYOK optional