After using 24" lines for 20+ years, I recently moved to longer lines (currently 30") based on:
Victor Fernandez & Marcilio Browne both use 34" ...
boardseekermag.com/longform/pro-kit-marcilio-browne/www.boardseekermag.com/longform/pro-kit-victor-fernandez/#Ijljiz77PgKgkCLA.97And also after reading this Fanatic forum thread ...
www.fanatic.com/forum/read.php?1,18913Craig G "As an example, recently in Pozo, I tried the rigs of Victor, Klaas and Gollito, all with extremely long harness lines - 34-36"...I usually sail with much shorter lines, maybe 26-28 and the sail really sheeted in, I guess from slalom racing days and overpowered wave sessions. Was super hard to get used to, as the rig is effectively straight up and you really stand over the board, instead of leaning out..on the first day I hated it, the second day it felt a bit better, by the 4th day totally normal and could really see the advantages in control, jumping hooked in etc... Just an example, but shows we can change our trim/setttings, even after 28yrs of windsurfing....:-))"
And also reading this ...
pritchardwindsurfing.com/harness-line-lengths-for-you/I like to be in my harness lines all the time. With my 30” lines, I can sail around in my harness when there is no wind- I couldn’t do that with a 24” line. I can go through the surf when the wind is light in my harness. As soon as I jump on my board, the first thing I do is hook in! When the wind backs off or I run into a lull, I don’t have to unhook to stay balanced on my board!
Looking back over 20 yrs with 24", I think the lesson learnt is that I lost a lot of time on water not being able to hook when I wasn't planing. As Pritchard says, you need to be able to hook in when you are not planing (in addition to other benefits).