Hello Montgomery Group! When we have the opportunity to sail our Montgomery 15 in larger waves that occasionally get up on deck, we find that water gets under the sliding hatch and into the cabin. This summer I found that towing the boat on the highway in rain has the same result, water getting into the cabin. This isn't a big problem but sometimes even a little water where you don't want it can be a nuisance (wet blankets and sheets for example). I wonder if anyone has improved this situation with some sort of seal attached to the hatch. For instance, I could imaging a strip of mylar attached to the hatch covering the gap between the hatch and the deck could cut down on water getting in to the cabin but also realize it could gum up the easy sliding of the hatch. Does anyone have successes, failures, or insights to share on this topic? Thanks! David GrahBishop California