In 1893 the fort was armed with a total of 23 guns: * Nine 64 lb (29 kg) rifled muzzle loaders * Eight 7 in (175 mm) rifled breech loaders * Six 8 in (20 cm) rifled muzzle loaded howitzers (three were on ground platforms; the other three on traveling carriages) A central spiral staircase from the surface gives access to four main tunnels running radially outward from it at uneven angles. These tunnels lead to the barrack block and caponiers, and past the magazine.