[Mobhack]

The barge carrier is a form of trying to get 12 or so hours of engineering work done in a 60 or so minutes game time frame. It can be seen as representing building ferries, bailey or pontoon bridges etc.

So - a "playability" thing, the original designers put in, for a mission type that I personally would have ignored for a batallion/brigade sized game if I had designed one myself, since bridging operations require hours of work, and the infantry to have cleared the far bank for some time ahead of the work starting. (See the crossing of the Suez canal for example - even with ferry equipment in place, tanks were not moved over till the far side was secure, and then several hours after H-Hour).

Cheers
Andy