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Naval Battery on The Garrison

At the turn of the twentieth century the Royal Navy had plans to make the Isles of Scilly the site of its main North Atlantic base.

Booms were to be constructed between various of the out-lying rocks and this battery was constructed to defend the anchorage in The Road.

The growing use of the Dreadnought style of battleship put paid to this plan as the entrances to the islands though the North West Passage and St Mary's Sound are not deep enough to accommodate the draught of those vessels. The plan was changed and Scapa Flow used instead.

This wall of the underground chamber (presumably the powder and shell magazine) has a date mark of 1900.