built for your hatches. I have a friend who has just picked up his set from the welder. I think it's a good idea but I have large doors in my pilot house and haven't figured out a way to stow something like that yet. I'm thinking of step pads at the lifeline gates and in the cockpit connected to a light and fire bell. We sleep with the hatches closed and pilot house doors closed and latched and with only the port holes open. It's OK at anchor but in marinas we have to run the air conditioner. We never seem to be in a marina where you get much of a breeze.