Re: Grumman (Sea Nymph) 21'
I have a 19.5 foot Sea Nymph GLS that I'm restoring. I have fished salmon here in Lake Ontario and walleye in the lake near the St. Lawrence River out of the same boat that my broter in-law had. I liked the boat a lot so when I fond one worthy of restoration I tackled the job. I've seen guys with the 21 grumman and these are about identical in hull degree and deadrise, probably why grumman contracted to sea nymph. I really like this boat for many reasons, but trolling in a stiff wind is difficult in any boat unless your going with the wind, it will get turned around pretty easy if the helmsman is not on point. As for the freeboard it's a pretty dry ride in two to three foot waves, nasty four and fives you get a little spray over the windshield. I normally put te bimini top up and close up the bow when it's real nasty. All in all it's a great boat, easy to tow and launch.... I do mine solo. Things to look for are rotting plywood under the carpets, you can feel them when you stand and bounce a little fells spongy, can be replaced fairly easy but it will end up costing several hundred dollars doing it yourself.
Its a durable boat, I've restored a couple real eyesores and after that they're as good as new if not better. Good luck catch some big ones!