The way I understand it, the trap lines are tied to the front pylons, to stop the mast from swaying to one side in case of a stiff breeze or something, until the mast is high enough, so the shrouds take over. The main reason I worry is that I have to put the boat together in an area with power and phone lines... not directly overhead, but If I were to lose control, it could get nasty fast. I know it isn't absolutely necessary, but I'd rather not end up fried. better safe than sorry.