Gordon - while you might not like the term 'unbreaking', I would argue that it is appropriate.  When a ROW boat alters course and is no longer giving the KC boat room to keep clear, she has broken rule 16.1 at that moment.  That is what the words of the rule say.  However, if the ROW boat continues to change her course and later is giving the KC boat room to keep clear then we say that she has met her obligations overall.  The rule was 'broken' and then 'unbroken'.

I can't believe that anyone reading Case 78 would remain in any doubt.

Was there some more background?

Did you invite your correspondent to:

What did the enquirer mean by 'match racing tactics'?

I can't recognise any match racing tactics in the scenario.

I agree with Randy.

A stuck her head in the noose by creating a windward overlap by bearing away across B, forfeiting her initial RRS 15 protection.  She then regained protection when B changed course.

Nothing in the fleet racing or match racing rules says that B is required to make it easy for A to keep clear.

Why did A take penalty turns?

Because she didn't understand how RRS 16/43.1 works?

Nothing in the fleet racing rules says that competitors who don't understand the rules should get special treatment.

Diego - yes, I get that in match and team racing part of the game is allowing the boats to get closer together than you would in fleet racing.  For fleet racing WS Case 103 helps us understand 'in a seamanlike way'

CASE 103
Definitions, Room
The phrase ‘seamanlike way’ in the definition Room refers to boat-handling that can reasonably be expected from a competent, but not expert, crew of the appropriate number for the boat.

But I'm not sure how this changes things other than to say that P breaks rule 10 earlier in the scenario, possibly at position 1.

Hi all,

Ric of course, thank you very much. I updated the fix. Spinning the boats fast should be now with expected result.

Next step in development will be a feature to record step by step movements, and be able to share this without login.

Best

There's this *amazing* website that has little pop-up case references next to each rule, with a helpful summary of the points therein. It references the Judging manual too sometimes. There's a small fee but well worth it for the functionality, as well as being able to deliver regattas on it.  It's called racingrulesofsailing.org ;-) 

Seriously - I use that as reference for all the WS cases. Of course, back to the original publications for definitive text but as a quick-reference it's invaluable. It directs you to the relevant case rather than reading all the cases and trying to backsolve for a given incident.