I think there are some broader questions that need to be asked about the planning of this. Perhaps the situation calls for a different start/finish line altogether—one that avoids the interference from the submerged rocks.

Rather than continuing to tinker with what is essentially a problematic setup, it may be worth considering whether relocating the start/finish line would eliminate the issue altogether. I’m not suggesting this as though it’s an obvious solution that everyone has overlooked, but rather from the perspective of reducing the club’s potential legal liability. If there is a known hazard creating an ongoing problem, addressing the underlying planning decision may ultimately be a more prudent approach than managing the consequences.

Doc .. if you pull up Kevin's MastaBeam, you'll see along the button that allow the user to turn off interpolation of positions and orientation. 

That's a start. 

At this point anyone can open the web-based player and play the preloaded J105 events to take a look at the tool. 

I see the dropbox in the form for "AI Involvement" now and hadn't noticed it earlier.  Thanks for pointing it out!

See discussion above.

Hitting an anchored boat may found a claim for damages, but does not break any IRPCAS rule.

Hitting a dock or pier, the same.

Clearly placed there by a trimmer trying to share the guilt! ;0))