OK, after some digging since I hadn't heard that term before......

That's Engine 48, Bayside and Sanders; kind of an odd duck. They were the only company down there and before I-75 went in, they would find themselves all alone if the Fort Street drawbridge was up. They had a strange rig called a Quad that was a combination engine and ladder truck, the only one of it's kind in the city back then.

They were not allowed to leave the area and come across the bridge even for maintenance unless a fill-in company was down there to cover for them.

Searching this thread, you should find a lot more information.