2. A ship sails due east from habour T (80°S, 60°W) and landed at habour S whose longitude is 20°W from S it sailed due North to R a distance of 6000nm.
i. State the respective positions of S and R.
ii. If the total flying time was 9hrs find the average speed of the aircraft in knots.
| a =60° | - | 20°= |
| The position of S = | °s, | °w |
| The distance along the small circle |
| TS in nm =TS = 60°*°*cos° |
| TS=nm |