1. a) Differentiate between DR position and Estimated position.
b) Explain with a diagram the effect of wind as leeway and current as set and drift
on course steered by a ship.
( 5 Marks)

2. a) With the help of a diagram explain any two of the corrections to be applied
to Sextant altitude.
i) Parallax in Altitude ii) Dip iii) Semi-diameter.
b) With the help of a ray diagram explain the principle of marine Sextant.