Module 07 · Assessing the passage
Before the chart: whose tide each port uses, what each harbour asks of you, the hazards and the traffic scheme on the way, the distance, and what to keep ready if it goes wrong.
How the lesson starts
Before a single line goes on the chart, ask whether the passage can be done, and when.
Distance, by eye. Dover to Boulogne-sur-Mer, entrance to entrance, is about 26.8 miles by sea. At 6.0 knots through the water that is about 4.5 hours before any stream — the stream will make it shorter or longer, and that is chapter 5.
The boat and the crew. Can they do it, and do it again tomorrow if the weather turns?
The route on the chart is Sam's, from chapter 1: in black, from the entrance of Dover to the entrance of Boulogne.
What you practise inside
- Before the chart
- The two ports and their tide
- Getting in2 exercises
- What lies between2 exercises
- If something goes wrong
This is a preview. The lesson itself is interactive: you work through it step by step, and every answer is checked as you go.