1. Write short notes on any two of the following:

True Altitude

Inferior Planet

Prime Vertical

2. On 1at Sept 1992, DR equator, 50°27' sextant meridian altitude of Sun's.UL was IfIE was 2·4' on the are, HE 17 find the latitude of observer and P.L.

3. On 19th Jan 1992, PM .at ship in DR 40°16' 175°31' the sextant altitude of Sun's LL was 43°27.4' at 03 h 48 m 00 s GMT. IfHEwas 22m, IE was 1·5' on the arc, find the direction of P.L. and draw the position from where to draw by Intercept method.

4. With a suitable sketch show how the altitude of Polaris is equal to the approximate latitude of an observer in the Earth's Northern hemisphere.

5. Define the following and state how you will find them on your ship:

Geographical Range

Luminous Range

At 1300 hrs Channel Light vessel bore 355°G and the distance by radar was 3 NM. Find the ship's position.

From 1300 hrs position find gyro course to pass EC-2 buoy 4 NM off on port side.

While on the above course, at 1600 hrs GPS showed 49°58' 001°58' W. Find the set and drift experienced by the ship. [GE for all parts

7. Write down the ten publications you will consult during the execution of passage plan.

8. Find the height of tide and depth of water on 2nd March at a position off Singapore where charted depth is 4 metres.

Extract from AT.T. for the day is given below:

Zone Time -0730
Time Height(m)
0014 2·7
0603 0·8
1209 2.9
1830 0.6