In reply to Mark Collins:
> You can make a tyrolean at the North (original route) or south end of the stack. If you go for the south end like I did, then you will miss the first (crux) pitch of the original route. The north end is more sheltered from the prevailing sea conditions though. I found that it required a significant length of rope to make sure of a dry crossing in all states of the tide. I had a 75m semi-static looped through some pegs on the stack, for easy retrieval on the return journey (as others have mentioned). These were backed up with a piece I added, which was also removed on the return journey. Use non-spikey gear to tension your tyrolean, otherwise you may damage your rope. Something that my dad suggested that worked really well, was after abseiling down from the top of the stack, take the ends of your rope across the tyrolean to the mainland before pulling. In that way, they fall well clear of the stack and there is no risk of them snagging on the way down. They will get soaked though, but I feel this is inevitable on such a venture. I was also shredded by barnacles one year, but this can be easily avoided by adding wet shoes and gloves to your extremities. I also used a winter wetsuit, which was great when you're in the water but hot as hell when you weren't. TR as follows:
Did something similar to you. I think the original first pitch was climbed because the FA party used a ladder to get across.
Other points.
Check for sharks and jelly fish before you doggy paddle across.
You can only back up stack side anchors for journey to not from the stack.
We did one short ab down, then about a 40m ab to gain the fixed rope and tension across to shore. This meant no gear abandoned on the stack and the stack side of the tyroleon anchor was not stressed after the route.
So, one swim, one transfer of clothes/ towel and one tyrolean ( possible wet bum).
2*50m climbing ropes, 1*50m static/old rope, 1 tow line ( 15-20 m? )
Post edited at 20:35