EXERCISE-20

1. On the morning of 30^th Nov 1992, in DR 39⁰ 50’N 100⁰ 12’E, the observed altitude of MARS was 48⁰2’ at 11h 42m 52s chron time. The chron error was 01m 10s slow. If HE was 22m, find the direction of the PL and a position through which it passes.

Solution –

2. On 22^nd Sept 1992, PM ship in DR 40⁰ 21’S 140⁰ 12’W, the sextant altitude of SATURN was 54⁰6’ when the chron (error 11m 31s fast) showed 04h 15m 42s. If HE was 20m and IE was 3.2’ on the arc, required the direction of the PL and a position through which it passes.

Solution –

3. On 17^th Jan 1992, AM at ship in DR 31⁰ 41’N 100⁰ 10’E the sextant altitude of VENUS was 19⁰6’ when the chron (error 02m 06s fast) showed 11h 41m 44s. If IE was 2.1’ on the arc and HE was 12m, find the direction of the PL and a positive through which to draw it.

Solution –

4. On 1^st May 1992, PM at ship in DR 19⁰ 54’S 179⁰ 58’W, the sextant altitude of JUPITER was 52⁰ 38’5’ when the chron (error 01m 10s fast) showed 06h 21m 52s. If IE was 0.2’ off the arc and HE was 17m, find the direction of the PL and a position through which it passes.

Solution – 

5. On 1^st Dec 1992, PM at ship in DR 29⁰ 56’S 106⁰ 14’E, the sextant altitude of SATURN was 46⁰8’ when chron (error 05m 01s slow) showed 12h 18m 33s. If IE was 1.3’ off the arc and HE was 14m, find the direction of PL and the longitude where it crosses the DR lat.

Solution –