Main halyard (bermuda mast) - 11 metres of 4mm dyneema/spectra or kevlar with polyester cover.For better kicking strap systems, it depends on the arrangement, see Fitting out the hull.

looped around the boom and tied on the stowage bulkhead) 2.5m of 3mm dyneema/spectra. 5.160 metres is the minimum length if you are trying to save weight etc. Jib sheet - 6 metres of 6mm diameter line with 8 or 16 plait matt polyester cover.Jib halyard - 8 metres of 3mm or 4mm diameter dyneema/spectra, Vectran or kevlar with polyester cover.4mm Excel Racing has a 3mm braided core, so is the smallest option for tapering. David Mossman of Marlow Ropes has pointed out that 3mm and thinner Excel Racing has a core of twisted, rather than braided, fibres, so is unsuitable for removing or tapering the cover. In general the UK MCA recommends the use of modern, high performance ropes with a dyneema/Spectra, Vectran or kevlar core (such as Marlow Ropes Excel Racing) to minimize stretch. These videos 'More grip, less friction' from Marlow Ropes (2020) give an insight into what is possible for those with the skills (or deeper pockets). Those who can splice and taper modern high performance ropes should be able to do better (e.g. These recommendations should be a good starting point and cover most situations. Below are recommended lengths and materials for the running rigging (sheets and halyards) on a Mirror dinghy (both traditional gunter rig with a gaff and the more modern Bermuda rig).

Eye splice cored line