EXERCISE-21

 

1. On 3^rd May 1992, PM at ship in DR 40⁰ 11’N 65⁰ 30’W, the sextant altitude of JUPITER near the meridian was 60⁰4’ at 00h 13m 50s chron time (error 04m 10s slow). If IE was 0.3’ on the arc and HE was 14m, find the direction of the PL and a position through which it passes.

Solution –

2. On 30^th Nov 1992, PM at ship in DR 56⁰ 04’N 120⁰ 04’E, the sextant altitude 0f SATURN near the meridian was 16⁰6’ at 09h 01m 49s chron time (error 02m 05s fast). If IE was nil and HE was 17m, find the direction of the PL and the latitude where it cuts the DR longitude.

Solution –

3. On 14^th Oct 1992, during morning twilight in DR 63⁰ 55’N 110⁰ 20’W, the observed altitude of MARS near the meridian was 49⁰5’ at 01h 15m 20s by chron (error 01m 00s slow). HE 10m. Find the direction of the PL and a position through which to draw it.

Solution –

4. On 17^th Jan 1992, AM at ship in DR 45⁰ 02’S 36⁰ 42’E, the sextant altitude of JUPITER near the meridian was 37⁰8’ when chron (error 01m 06s slow) showed 01h 26m 14s. If IE was 0.6’ off the arc and HE was 12m, find the direction of the PL and a position through which it passes.

Solution –

5. On 4^th May 1992, AM at ship in DR 52⁰ 13’S 64⁰ 15’W, the observed altitude of SATURN near the meridian was 53⁰8’ at 10h 59m 51s chron time. If chron error was 01m 51s fast and HE was 20m, find the direction of the PL and the lat where it cuts the DR long.

Solution –