Morninig Sight

How to take Morning Sight ?

1. First we need to suitable stars which can be found using the star finder.

2. For morning twilight find out LMT Nautical Twilight apply to get GMT and ZT to get SMT.

3. Now apply run to last known position to get DR Latitude and Longitude from current SMT to the SMT obtained.

4. Now from almanac get GHA Aries and apply longitude  to get LHA Aries.

5. From DR Latitude andd LHA Aries go to star finder and using the correct template closest to DR latitude choose 3-4 stars.

6. Criteria for choosing the stars should be as follows.

• Angular sepration should be as close as possible to 90°.
• Chosen stars magnitude should be low i.e. they should be bright.
• Altitude should be between 20°-70°.

7. Now for morning sight start with the stars on eastern horizon as they will disappear from horizon first, take the altitude and azimuth note down the time for all the stars.

8. Use 3 stars for plotting purpose. Apply run to the obtained PL using Intercept to nearest hour. Point of intersection of the PL's would be your position.