The timber floored upper gun floor had a similar function to the lower Gun Floor. The gun ports here housed lightweight cannon known as carronades.

The cupboard immediately to the left of the door, housed the tools or "sidearms" needed to operate the carronages. the large opening high above the two gun ports helped the dispersal of smoke.

By the steps at the far left hand corner of the Upper Gun Floor there is an ammunition shaft which also acted as a light well. A lantern hung at the top of the shaft illuminating the stairs via the opening strategic points.

At the top of the stairs, just before you step out into the open, there is a door to your left which gave access to a concealed observation point