10 techniques for determining a tidal window
Here are ten techniques to compute tidal windows. Some of them are useful in practice, others are useful for exams. Read the section that suits your needs.
Learning
On the Closest Point of Approach
The practical use of the CPA/TCPA pair is to evaluate the risk of collisions. If the CPA of a boat is zero (or close to zero), there is a collision risk and the skipper should alter the boat’s current course to increase the CPA.