We have re-published the document Stephen Bolton wrote in April last year which clarifies how to Finish on water under shorten course. He wrote this document after the course on the day was shortened due to a massive front on the horizon and because Retriever became literally 'stuck to the bottom' whilst shortening, not all boats Finished correctly on that day either.
Click here to read that document.
In brief, the Golden Rule offered at the conclusion of that doco is 100% accurate for on water finishing anywhere in the world - and it can be easily tweaked for our MYC fixed mark racing when the course is shortened from the Tower.
Principally, though, it is the same!
In the April 2017 doc, Stephen Bolton wrote:
‘Golden Rule for Shorten Course at a Mark:
Always sail between the vessel displaying Code Flag S and the mark it is adjacent to from the direction of the last mark (‘from the course side’) - no matter where the Committee vessel sits, no matter which mark it sits at and no matter what hand course you are sailing.’
And because the Tower is always in the same spot(!) and Mark ‘S’ is always used for our fixed mark courses, we can tweak the way that Golden Rule reads a little so that it applies to the to the Tower and not on water vessels:
‘Always sail between the Tower displaying code flag and Board S and the ‘S’ mark from the direction of the last mark (‘from the course side’) - no matter which mark you're coming from and no matter what hand course you are sailing.’
Note: Whilst it would be pretty rare for a fixed mark course to be shortened anywhere BUT at Mark 'S', it is technically it is possible - and, if done, the first version of the golden rule immediately applies!
We hope it helps!