: Only two cents worth from me, but polyester stretches less than
: nylon - wet or dry.
: Also, using thicker line (1/4 vs 3/16 for example) will reduce the
: stretching problem a bit, as will pre-stretching the line before
: putting it on the boat.
: Climbing accessory cord/line is designed to stretch (absorb
: impact); most of the 'yachting' aka dinghy sailing lines are low
: stretch- even the cheaper types.

Actually though while stretch isn't a good thing, having the deck lines tight isn't either. Need to easily be able to slip your hand under the lines, can't be taunt and have access easy. I use a short bungie to pull them tight with a polyester "keeper" to limit the amount that can be pulled so they are both taunt on the deck but easy to get your hand under them if need be.

Bill H.