Exercise – 9

1. On 5^th March 1992, AM at ship in DR 38⁰ 11’s 151⁰ 10’E, the sextant altitude of the Sun’s LL was 350 59.1’ when the chron showed 10h 54m 54s. The chron was 01m 20s slow at 12h GMT on 25^th Feb 1992 and gaining 4s daily. If IE wsa 1.3’ off the arc and HE was 30m, find the direction of the PL and a position through which it passes.

Solution –

2. On 22^nd Sept 1992, PM at ship in DR 48⁰ 20’N 850⁰ 40’E, the Sextant altitude of the Sun’s UL was 20⁰8’ when the chron (error 06m 18s slow) showed 10h 03m 20s. If IE was 2.2’ on the arc and HE was 25m, find the direction of the PL and a position through which it passes.

Solution –

3. On 19^th Jan 1992, at about 1530 at ship in DR 40⁰ 16’S 175⁰ 31’E, the Sextant altitude of the Sun’s LL was 43⁰4’ when the chron (error 02m 12s fast) showed 03h 50m 12s. If HE was 22m and IE was 1.5’ on the arc, required the direction of the PL and a position through which it passes.

Solution –

4. On 30^st April 1992, in DR 00⁰ 20’N 60⁰ 12’W, the sextant altitude of the Sun’s UL East of the meridian was 440 13.4’ when the chron error 03m 09s slow) showed 00h 57m 43s. If IE was 3.1’ off the arc and HE was 20m, find the intercept and the direction of the PL.

Solution –

5. On 31^st Aug 1992, PM at ship in DR 100 11’S 0000 00’, the sextant altitude of the Sun’s LL was 390 15’ when the chron (error 01m 30s fast) showed 03h 111m 20s. If IE was 2.5’ on the arc and HE was 17m, find the direction of the PL and a position through which to draw it.

Solution –