Cruise Nav vs Celestial Navigation

Ever wondered where you are at sea, how fast you’re going, how far until the next port of call, or how many hours remain on your journey? Cruise Nav gives you the answers—right from your phone. Key Features: • Works Offline: Uses GPS signals even in Airplane Mode to show your live position, speed, distance, and estimated time to destination. • Flexible Units: View distances in Kilometers or Nautical Miles. • Ports Worldwide: Search hundreds of ports, or add your own destination with a long press on the map. • Custom Routes: Draw your own route to get more accurate distance and time estimates. • Satellite & Map Views: See your trip your way, online or offline. Tips for Best Results: • GPS reception may be weaker inside the ship—try using the app near windows or out on deck. • For smooth offline use, open the app while still connected to the internet to cache map details. • Note: Continued GPS use can reduce battery life.

This app does all the calculations to reduce a sextant reading to a line of position on the map. All intermediate numbers are shown to check your manual calculations. • Perpetual nautical almanac • Calculation of the line of position (azimuth and distance) • Draws the line of position on the map. • Star Finder: just point your device to the sky to identify the navigational stars. • Save your readings, choose what to show on the map. A sextant is required to make full use of this app.