Estimated position with 10 degrees of leeway

Exercise book 4.8 · on paper you need RYA chart 3, the tidal almanac, the deviation card

On Saturday 12 October at 1455 SPDST you are at 45°53.35'N 005°46.74'W with the log at 0.2; at 1555 SPDST the log reads 5.6. You steer 090° by compass in a southerly force 4, leeway 10°. Variation 6°W. Use tidal diamond K. Find a) the EP at 1555; b) COG and SOG.

Starting position: 45°53.35'N 005°46.74'W
Log: 0.2 at 1455, 5.6 at 1555 SPDST
Compass course: 090°C
Variation: 6°W
Leeway: 10°, wind S4
Victoria 12 Oct (UT): HW 1425 5.0 m; LW 0811 1.6 m, 2043 1.6 m
Diamond K, HW−1: 110° 3.2 kn springs / 1.7 kn neaps

Solution worked out by us from the course material: to be checked by the instructor.