QUESTION PAPER 1

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  1. a) Define:- i) Position Line    ii i)  Estimated position                                                (5 Marks)

 

  1. b) On 14th Nov 1992 at noon, a ship’s in DR position 17⁰ 08’ N 136⁰ 32’E, set courses as follows:-

 

  Time True Co. Leeway Wind Log
  1200 274⁰ 3⁰ SW 0
A/Co 2300 256⁰ 3⁰ NW 138
A/Co 0700 286⁰ 1⁰ NNW 246
A/Co 1200 244⁰ 3⁰ W 309

 

Ship experienced a current setting in the direction 140⁰ at 1.0 knots

Find the estimated position next noon.                                                                                (5  Marks)

 

 

  1. a) The Horizontal sextant angle between two light houses is observed to be 180⁰, what   conclusion can be  drawn from the observation?                                                          (5 Marks)

 

  1. b) If the height of a light given on the chart is 22 mtrs and the height of the observer is 17 mtrs. Find the distance at which the light will be raised?                                                              (5 Marks)

 

  1. a) How will you obtain Index Error on a marine sextant.
  2. b) What are the uses of Azimuth mirror?                       ( 10 Marks)

 

 

 

 

 

4     a)  What are T/P notices?                                                                                                          (5 Marks)

b)  Define ‘geographical range’ and ‘nominal range’.