The 4m blockhouse is located on the east wall of the quarry and is best reached by doing a perimeter dive. Entering from either the Bus Stop or closer to its location the Slipway, follow the wall on your left shoulder at a depth of 5 metres. It is 15 - 20 minute slow swim.


History & Description: The 4 metre blockhouse is a small building with a single door on the south side and 2 small square windows on the north and west sides. At a depth of 4 metres it sits on a ledge built close to the side of the quarry wall which drops away to 20 metres below the west facing side of the building.


The block house can be found by taking a bearing 130 degrees from the Wessex Helicopter.

 Or take a bearing of120 degrees from the

bus stop A.