Re: Most UV resistant rope
I have been using the same polyester braided docklines --light blue-- that I spliced up for 15 years. Maybe more???
These see 7-8 months a year in the sun all day at 41N. (They also get froze.) These are still in fine shape...supple, no visible sign of deterioration, etc. Even the color is still pretty bright, though more muted than when new. Yale Cordage brand, I know, because I came into a several-hundred-foot spool of 7/16" way back when for a steal price and was selling it off as finished dockline spliced to order at a premium price.
Kevin
There are two kinds of boaters: those who have run aground, and those who lie about it.