You wrote above: "Two meter wake? With the ferry pushing that much water that close, I’d say regardless of the Captain’s actions something was at risk for popping._
I’m gonna go out on a limb here and guess that when you say “in the office” that you’re QHSE and looking for a root cause in the incident? I’d go with the ferry overtaking too close, too fast, and not giving sufficient and proper signaling of his intentions to give your captain ample time to make adjustments to safely reduce the effects of the offending vessel’s wake."
I was replying to that post originally, but when I saw that my answer to you would not appear next to your post but at the bottom of the pile I decided that would be too confusing and deleted it. You replied to the deleted post before I got to it.
What I had to say in the deleted post was that in pilot waters an overtaking at 400 yards is not often considered a matter that requires a formal passing arrangement. The rule you quote above does not add to a discussion between experienced mariners. There is an element of “risk of collision” which your quote ignores. Overtaking a tow 400 yards away in a river 3/4 of a mile wide does not necessarilly mean there was any risk of collision and the lack of that communication did not contribute to the accident under discussion.
I wrote a more complete post above if you are interested.
And forget about “root cause” stuff. Anyone who thinks there is an original or “root” cause to accidents has never seen the roots of a real plant (or accident). They are bundled, entertwined, complex, and numerous.