While not able to beach itself (as far as I know) these two ships would very like be of significant importance.
http://www.spiritoftasmania.com.au/e...about-the-ship
They travel between mainland Australia and Tasmania (where I am) daily carrying a huge amount of cargo and passengers to and from here.
The lower decks are big enough to easily accomodate a large number of trucks and heavy equipment, some of which would rival tanks for weight and are certainly a lot bigger.
While built a little too late for T2K (1998 in Finland) they are a useful example I would think.