Again some very specific requirements for this category: the barge must have a crew of 2: an operator and a gunner, and you must show the operator in the wheel house. It must fit your Category 4 MOC, and be shown unloading it, and it must have a number on the side.
So this is Barge 12, made to size to transport Rhino APC's across the water.
Here's a short of the crew, operator Flounder and gunner Figaro.
And this is the required shot of the operator in the wheel house.