Paper 6

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Note: Attempt any THREE questions from this section. All questions carry equal Marks.
1. Sketch and define the following:
(i) Greenwich Hour Angle (ii) Local Hour Angle (iii) Sidereal Hour Angle
(iv) First Point of Aries (v) Declination
2. (a) What is the “International Date Line”?
(b) Why is it necessary to change the date, while crossing 180° meridian and how is the change effected?
3. Derive the formula: Sine Amp = Sine Decl. Sec Lat.
4. (a) What is a “Position Circle” and how is it obtained?
(b) What is a “Celestial Position Line”, and why is it drawn at right angles to the Azimuth?