I believe the answer to this question is much simpler than I’m trying to make it, but I can’t figure it out.

What is the formula for calculating the width of a ship track with each additional angle of crab?

Example:

600’ x 106’ ship. With zero crab angle, track through water is 106’ wide.

When holding up for 3 degrees of set, what is the width of the track through water? 140’, 160’?

Somebody told me once that at 5 degrees you double the width of the ship (in this example, 212’), but I can’t figure out if this is accurate or not.

Any of the smarter ones around here have an idea on how to calculate this???