It depends how you route
them Greg, but I would allow enough for the wingaker to fly 10m above the deck
, so length of guys 10m plus the length from the bow blocks back to the winches plus enough for a few turns in the winch
. About 20m for each should do. Guys can be 10mm, sheets 13mm diameter. We run our guys from the foreword blocks, up to the turning blocks at the base of the mast
, through the turning blocks on the cabin
top and to the jammers. We use the reefing line blocks and jammers for the parasailor as we never use them when flying the parasailor. Bowlines for sheet attachment work well and allow to shorten a few cms as needed and cut the excess off the end. Check the masthead block carefully and upgrade it if necessary, they've been known to break pretty easily as some are just riveted on the face of the mast
, they're not really designed for parasailor/wingaker stresses.