No handheld is going to have more than 5 watts, and virtually all of them will have that. Some of the submersible models do not float. To me that is counterintuitive so think about floating options or a way to store it where it will not sink with your reels. I have a yaesu (standard horizon affiliate) handheld for amateur radio that is great. On the other hand, my standard horizon mounted on the boat is not as nice as the icom also mounted on the boat. I think you can't go wrong with those brands in terms of quality, just make sure they float or you have a plan to keep it near and tethered on the boat.