StarPilot!

The state-of-the-art solution to navigation computations on your iPhone or iPod touch. StarPilot does celestial sight reductions of all bodies using high-precision internal almanac, plus mathematical and graphic solutions for position fixes, great circle, rhumb line, traverse and composite sailings, all current problems, piloting solutions, and much moreincluding lunar distance method of finding GMT from the sky and a unique graphical Sight Planner, and the new Sight Analyzer function that helps you get the most accurate results from a series of sights. Set cursor and click to read the actual height and bearing of a plotted body.- Special fast almanac mode allows full sky plot - Display internal list of 173 stars by name, brightness, and location- Unique BEST SIGHTS function selects the optimum triads of sights for any skySight Reduction- Optional modes for sequential sights using repeated settings or unrelated individual sights- Perpetual almanac accurate to 2100+- Historically accurate almanac data to 16th century- Sight reduction of Sun, Moon, Mars, Venus, Jupiter, Saturn plus Mercury - Sight Reduction of 173 stars plus Polaris- Assumed positions read directly from DR section without extra input- View intercepts (a-values) with or without course and speed corrections- Full input data displayed with results to check for errors- Special center-body mode for artificial horizon data- Dip-short mode for practice at shorelinesCelestial Fixes- Unique SIGHT ANALYZER fits a sequence of sights to the right slope for optimum sight selection- All fixes corrected automatically for course and speed as needed- Fix accuracy independent of DR accuracy in all cases- Plots LOPS with live cursor position display- Fix computed by USNO algorithm in the Nautical Almanac- Zoom in on plot to see where computed fix is located- Fix can be obtained by graphic selection from the LOP plot- Automatic display of DR-to-Fix range and bearing- Optional automatic update of DR after fix- Display new course and distance to stored destination