Test Papers / Previous Question Papers of IGNOU BNS202 Navigation II-B June 2005

DIPLOMA IN NAUTICAL SCIENCE

Term-End Examination

June, 2005

BNS-202 : NAVIGATION II-B

Time: 2 hours
Maximum Marks : 70

SECTION A

BRIDGE EQUIPMENT & COLREGS

1. Explain with a simple block diagram the working principle of a Marine Radar. (7)

2. Describe the general procedure to change over from hand to auto steering. (7)

3. Explain how GPS determines position of an observer. (7)

4. How would you take over a bridge watch at sea in restricted visibility ? (7)

SECTION B

METEOROLOGY & OCEANOGRAPHY

7. Describe briefly four main ways in which clouds are formed. Support your answer by suitable drawings/skeiches. (7)

8. Describe briefly warning signs of an approaching tropical revolving storm and how you would go about ascertaining the bearing of the storm centre. (7)

9. Code the following ship's report : (7)

Ship: WWX, Position: 19^o50' N 89^o 32'W,
Course mode good : Last three hours 320^o at 14 Knots,
Visibility : 18 km, Wind : 230^o estimated at 18 Knots,
Pressure 1030.0 mb, Tendency : +6.8 mb,
Barograph trace ( /),
GMT : 07 d 06 h 12 m .

Temperature : Dry 28.3^o C, Wet 22.8^o C, Sea 21.6^o C,
Clouds : total 5/8 of sky, Low clouds 3/8 of sky, base 1200 metres above sea, Sc not resulting from Cu, Dense Ns, Ci in hooks progressively invading sky,
Weather: Present- Precipitation near but not at the station Past ___Cloud covering more than 1/2 sky throughout and intermittent drizzle.
Sea : Period 08 seconds height 01 metre.
Swell : From 070^o, Period 10 seconds, height 01 metre.

10. Distinguish between 'Spring tide' and 'Neap tide'. (7)