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Height of tide and depth of water

From what time you can enter the marina

Manuale Yachtmaster p.13 · on paper you need the tidal almanac, the tidal curve

On the evening of 21 July you want to enter Victoria Marina, where the sill dries 4.4 m. Your boat draws 1.8 m and you want 0.5 m of clearance. High water is at 2248 BST (8.1 m) and the previous low water at 1652 (2.6 m). From what time can you enter?

Sill
dries 4.4 m
Draught and clearance
1.8 m + 0.5 m
High water
2248 BST, 8.1 m
Low water
1652 BST, 2.6 m
Port curve (manual): factor 0.75
at HW−1 h 50

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