So my barge needs to be secure. It seems that despite pier security, people may have gone on my boat when I wasn't there (something expensive has gone missing). I'm not going to bother reporting it because I can't blame anyone or prove anything if I did. So here's the deal. I need to secure the boat. In order to do that I need to install a deck hatch; 18x24. For whatever reason the searches I've done lead to hatches completely useless to me. What resources can you recommend? Need to do this on the cheap.