First we need to choose suitable stars which can be found usin the star finder.
For morning twilight find out LMT Nautical Twilight and for evening twilight find out LMT Civil Twilight,
Apply LIT to get GMT and ZT to get SMT.
Now apply run to last known position to get DR latitudes and Longitude from current SMT to the SMT obtained.
Now from almanac get GHA Aries and apply longitude to get LHA Aries.
From DR latitude and LHA Aries go to star finder and using the correct template closest to DR latitude Choose 3-4 Stars.
Now for morning sight start with the stars on eastern horizon as they will disappear from horizon first, for evening sight we will have to set the sextant at obtained altitude and azimuth from stars finder for stars on eastern horizon as the eastern horizon will disappear first.
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.
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