EXERCISE-15

1. On 12^th Sept 1992, AM at ship in DR 00⁰ 30’S 160⁰ 20’W, the sextant altitude of the star ALDEBARAN near the meridian was 73⁰5’ at 03h 59m 29s chron time (error 05m 03s fast). If IE was 1.2’ on the arc and HE was 9m, find the direction of the PL and a position through which it passes.

Solution –

2. On 2^nd May 1992’ PM at ship in DR 44⁰ 11’S 102⁰ 40’E, the sextant attitude of the star POLLUX near the meridian was 17⁰6’ at 10h 52m 08s chron time (error 02m 12s slow). If IE was 3.6’ off the arc and HE was 12m, find the direction of the PL and the latitude where it cuts the DR longitude.

Solution –

3. On 20^th Jan 1992, during morning twilight in DR 44⁰ 07’N 64⁰ 47’E, the sextant altitude of the star ARCTURUS near the meridian was 64⁰8’ at 02h 04m 54s by chron (error 10m 58s slow). IE 3.1’ 0ff the arc; HE 18m. Find the direction of the PL and a position through which to draw it.

Solution –

4. On 5^th March 1992, at about 1835 hours at ship in DR 66⁰ 40’N 86⁰ 50’W, the sextant altitude of the star BETELGEUSE near the meridian was 30⁰2’ when chron (error 18m 04s fast) showed 00h 40m 30s. If IE was 0.7’ off the arc and HE was 14m, find the direction of the PL and a position through which it passes.

              Solution –

5. On 21^st Sept 1992, AM at ship in DR 20⁰ 50’S 62⁰ 30’E, the observed altitude of the star CAPELLA near the meridian was 23⁰1’ at 01h 15m 06s chron time. If chron error was 00m 04s slow and HE was 10m, find the direction of the PL and the lat where it cuts the DR long.

Solution –