These were the workhorses of the MRF. The name Tango came from the phonetic alphabet word for the letter "T" that was part of the designation for the boat (ATC).

The crews of the Tangos were a great bunch of guys. We always left the boats covered with mud and garbage. I don't remember ever hearing a complaint from the boat crews. They treated us well. They lived on the boats and we were guests in their home for as long as the trip lasted. They had their job to do and we had ours, but that melded into one common objective. We shared the same dangers. They called us grunts and we called them squids, names that we wore proudly. There was mutual respect between us.