Through the gun port doors you will see the Great Barrier Ditch which used to run all the way down to the River Medway. The 2 arched brick bridges spanning the ditch were built around 1890 to replace the earlier drawbridges.

The pit below the gun ports prevented an enemy climbing in through the gun ports whilst the working single fireplace provided some comfort for the gunners whilst on duty.

The guns mounted on this floor were two 24 pounders on garrison carriages.  Both guns were capable of firing solid, chain, bar and grape shot.