Named because it was sited below the Levanter cloud, thus having a clear field of view when the higher batteries on the ridge were obscured. Designed as a single gun battery, it was begun in April 190 I and by August 1903 it mounted one 9.2 inch BL Mk. X gun on a Mk V mounting. In the photograph below the battery is located in the lower circle, approximately 100 metres above can be seen observation posts known as Fire Control South (middle circle), the top circle indicates the position of Spur 9.2 inch Gun Battery. Fire Control South would have provided range and target information for these batteries and others on the upper ridge during occasions when the top of the Rock was covered by the famous Levanter cloud.
When the armament was approved in 1901 there was provision for two guns, the present one to bear on Mediterranean waters and a Mark X with a range of 14,000 yards to bear on land batteries in Spain.
On 31 December 1915 the gun fired two rounds at an enemy submarine, there is no further information about the success or failure of this action.
On 23 March 1934, during practice fIring, a shell burst in the bore and a new barrel was installed on 20 April 1934.