Paper 2

SECTION – A CELESTIAL NAVIGATION (40 Marks)
QUESTION NO 1 IS COMPUSORY. ATTEMPT ANY THREE FROM THE REMAINING
1. Define following:- i) Geographical position of celestial body ii) Mean Sun
iii) Sidereal hour angle (10 Marks)
2. On 30th April 1992 PM, in DR 12⁰ 37’ N 179⁰ 12’W, sextant altitude of Sun’s UL was 31⁰ 18’ at GMT time 1st May 03h 59m 24s. If the IE was 3.2’ on the arc and HE was 18.7mtrs, find the longitude by Long. by Chron method and the direction of PL. (10 Marks)
3. On 4th March 1992 AM, in DR longitude 080⁰ 00’E, the sextant altitude of pole star at GMT 00h 30m 50s was 28⁰ 03’, IE 2.0’ on the arc, HE 11mtrs. Find the Latitude of the observer and the direction of the position line. (10 Marks)
4. On 15th June 1992, in DR 20⁰ 56’ S 080⁰ 00’E the sextant altitude of Sun’s LL near the meridian was 45⁰ 40.2’ when GPS showed 15d 06h 35m 44s GMT. If the IE was 1.6’ on the arc and HE was 17mtrs., find the direction of the PL and the Latitude where it cuts the DR Longitude. (10 Marks)
5. On 9th October 1992, in DR 35⁰ 10’ N 161⁰ 15’W the observed sextant altitude of Sun’s LL was 30⁰ 04’ GPS showed 10d 01h 36m 10s GMT. If HE was 15mtrs, find the intercept and the direction of PL. (10 Marks)