Navigation A — Coastal — question 20

At 09:30 a true bearing of the light at the end of the Ashdod Marina breakwater, taken at the exact moment it rose above the horizon, was 123°. The observer's height of eye above the water is 4 metres. From the 09:30 position the vessel must reach, at 11:30, a position 6.5 miles west of the Jaffa light. Find:

1. The range of the Ashdod Marina light at the moment it rose above the horizon. 9.7 miles
2. The vessel's position at 09:30. 31°53.3'N 034°28'E
3. The true course to the destination. 038°
4. The speed needed to reach the destination on time. 6.4 knots

The question is solved on chart 1000. On the site it comes with the relevant sections of the chart.