Not sure if this has an official name but I'm calling it a "Deck Flip Lock" because it locks your deck in place with a flip.
No photos(yet), I'm installing some into a transport tomorrow.
Use as many or as few as you need, likely 4-6 for small battleships, cruisers, transports, &c.
If you have any comment, suggestions, or requests shoot me a message or make a post!
Left picture is the thingies.
right picture is how I'm using them on my transport. They hold down the deck pretty well!