Celestial navigation application with
- perpetual almanac
- star finder chart, with animation
- calculation of lines of position ( intercept/delta )
- celestial object data
- meridian passage calculation
- running fix support
- astronomical position calculations, with two or more star observations
- Hipparchus 150 star catalog

Program can be set to use device's sensors (gyro, compass)
to position the star finder chart in real time.
Capture celestial object approximate altitude.

Note that you still need a marine sextant to do celestial navigation,
but the phone sensors may be used for training.

Software for iPhone and iPad, with the same features.
e-book with manual and celestial navigation tutorial.