Celestial Bodies
Listed here are the azimuth, altitude and brightness of the sun, moon, planets and stars used in astro navigation. The list is sortable, so you can easily find and select the object you want to take a sight on.
If you have clicked on Advanced, you see the ephemeris data as well (as shown above). GHA (Aries) is given, as well as the Right Ascension, Declination, Greenwich Hour Angle and Local Hour Angle of the highlighted object. Clicking on Ephemeris to xxx.out allows you to save this data into a file, if you want. This data is calculated from astronomical formulae that are accurate for hundreds of years, so the program effectively does not expire, and no periodic updates are required, nor do you need to type in any values from this year's star almanac..
Select the body you want to take a sight on, make a note of the azimuth, and set the sextant to the altitude. Now just point it in the right direction, and you should see the body in the sights. Click on Observe to actually take the fix.
Celestial Bodies
Listed here are the azimuth, altitude and brightness of the sun, moon, planets and stars used in astro navigation. The list is sortable, so you can easily find and select the object you want to take a sight on.
If you have clicked on Advanced, you see the ephemeris data as well (as shown above). GHA (Aries) is given, as well as the Right Ascension, Declination, Greenwich Hour Angle and Local Hour Angle of the highlighted object. Clicking on Ephemeris to xxx.out allows you to save this data into a file, if you want. This data is calculated from astronomical formulae that are accurate for hundreds of years, so the program effectively does not expire, and no periodic updates are required, nor do you need to type in any values from this year's star almanac..
Select the body you want to take a sight on, make a note of the azimuth, and set the sextant to the altitude. Now just point it in the right direction, and you should see the body in the sights. Click on Observe to actually take the fix.