How to hold reefer lids on at sea?
This message string is not in reference to Jimmy Buffet type refers. It is about refrigerator/ freezer hatches.
I had a problem with drawers that kept flying open at sea and sovled it by putting a couple of pad eyes near the drawers so I could run bungee cords over them while at sea. I could pull the bungee to the side to get access but otherwise it held the drawers closed. A couple of bungee cords running across the hatches might do the trick for you and would be easier to install than hinges.