Light on the horizon: visibility and dip
Eye height and light height — check range and visibility.
Guides
Practical how-tos
Clear steps for every major feature — linked to NauticCalc tools for use on board.
Variation & compass
Find variation for your berth
Look up variation for place and time and use it in mwK and course correction.
Create and maintain a deviation table
Step by step to a vessel-specific deviation table — the basis for MgK and course correction.
Course & current
Calculate apparent wind
Convert between apparent and true wind — for trim and course work, offline.
Log line: measure speed
Boat length and time — speed without GPS.
Convert nautical units
Bridge calculators: speed, distance, wind and more.
Current triangle: set and drift
Derive current from course and speed or the reverse — step by step.
Course correction: from rwK to steering course
Walk through the course chain in the app — from planning to the steering course on board.
ETA & passage time
Create a Voyage Briefing
Draw the route on the map and check legs with ETA, weather and safety hints.
Plan ETA for the next leg
Distance, speed and departure — expected arrival for the passage.
Polar & ETA
Set up a polar and use it in the briefing
Five steps from “no polar” to a calculated arrival time: import, check, use in the briefing, back it up.
Instruments & NMEA
Connect an NMEA gateway and carry values across
From the onboard Wi-Fi to the value in your calculator — step by step, including the iOS permission that trips people up most.
Tides & BYOK
Set up weather API keys (BYOK)
BYOK for marine weather — provider account, key stored securely in the app.
Set up a WorldTides key (BYOK)
BYOK for tides — account with the provider, key stored securely in the app.
Logbook & safety
Ship's Kitty: settle fairly
Record crew expenses, split shares and settle up fairly — all local.
Set up anchor alarm and geofence
Peace at anchor: alert when you drift too far from the anchor point.
Export logbook: PDF, CSV and crew
Export for archive and crew briefing — all local, no cloud.
GPS position and logbook
Use GPS locally: show position and automatic log entries.
Offline & cruising
Prepare for offline navigation
Use core calculators and offline tides, set up live data at the berth — offline-first.