The Devonport site is located in Plymouth, Devon in the southwest of England. The site provides electromagnetic ranging of ships and submarines, and a harbour entrance Range. It is split over three facilities:
HM Naval Base Devonport: the Main Office
Eastern Kings: Harbour Entrance Range (HER)
Pier Cellars: Electromagnetic 20m Open Sea Range
In addition there is an Electromagnetic 9m Open Sea Range at Weymouth and a Harbour Entrance Range (HER) at Fort Blockhouse, Portsmouth.
Eastern Kings and Portsmouth HER are unmanned facilities. Eastern Kings is located on the western end of Plymouth Hoe at the bottom of Stonehouse barracks. The Portsmouth HER is located within Fort Blockhouse, Haslar Road, Gosport. These Ranges automatically gather magnetic signatures of vessels entering and leaving Plymouth and Portsmouth Harbours.
The Ranges at Fort Blockhouse offer the following capabilities:
HM Naval Base
Tel: 01752 552448
Harbour Entrance Range
Tel: 02392 335511