For the record, I anchor a 7m cat that weighs 3.5T. 12mm is good!
We just pein shackles especially on overnight anchor. Bolt cutters if we ever need to remove. Seen a undo themselves and too easy for tie wire to break off on a rock etc. Friend uses stainless and wire crimp or bends a stainless split pin through them as they are thick and flexible.
For the record, I anchor a 7m cat that weighs 3.5T. 12mm is good!
I have been using 8mm all my life and yet to break it once..I went from a 5.5mtr boat to a 7mtr plus boat and still yet to break that same rope. Larger rope will just cause more drag and take up extra room.
Greg
http://www.oztion.com.au/buy/auction...dis=0&freepost=
got this rope just over a year ago and is fantastic.
got the 8mm becose it will go into the anchor winch im building. but its good to pull up by hand.