From Ken Mascord's Memoirs

In 1985, Sweeny entered Diamond Cutter II in the Sydney to Hobart.  It proved an interesting race.  

We started in a good northerly which stayed in all afternoon until the southerly came through at midnight.  We were off Jervis Bay, well out to sea; we'd been chasing a strong southerly current, so we set out to take full advantage of it.  South from Jervis Bay, the current swept to sea in an eddy, so we didn't have to keep heading so far to sea.  It wasn't a strong southerly and settled down to a good sailing breeze.  

All day, I watched the wind and the sky.  By evening, the southerly was fading.  The forecast predicted that it would continue easing and jiggle to the south east.  All yachties know, that's what a southerly does, right?  

I was reading signs that pointed to it kicking back in from the west so being on the western side of the fleet wasn't going to be the wrong side to be.  Some of the crew were annoyed.  I'd put them exactly in the wrong place.  But I'd seen this once before when I'd misread the situation.  Bout nine  pm that night when we were somewhere near Green Cape, the wind came in fresh and hard from slightly south of west.  We sailed across the paddock powered up with slightly sprung sheets and carried that breeze all the way down the eastern Tasmanian coat. 

I calculated that we were leading on corrected time from the morning after that westerly stream came in and held that position all the way to Tasman Island.  What the sailing gods give, they take away.  At Tasman Island, we sailed into a deadly hole and parked for four hours.  We managed a fifth place on corrected time but who ever heard of the yacht that came fifth.