
Although the majority of emplacements that exist within Brixham battery grounds today are WW2-era, the nineteenth century stone altitude marker and iron cannon racers still remain.
The photograph to the left is of the altitude marker as it looks today. Upon closer inspection one can see there are inscriptions upon the pillar (best made out where the sunlight is hitting the top of the marker).
For a number of years the inscriptions on the pillar remained a mystery. Thanks to the aid of English Heritage and a can of shavng foam we were able to read what they said:
Line 1 - RANGE TO DATUM POINT 1100 Yds
Line 2 - DOOR ON MOLE
Line 3 - TRAINING
Line 4 - Ht OF INSt ABOVE M.S.L. 120.3 Ft
Line 5 - RISE AND FALL OF THE TIDE 10 Ft
Line 6 - Ht ABOVE RACERS 32 Ft
Line 1. This information would be needed to calibrate the range finder.
Line 2 and 3. The information is incomplete and so the relevance is lost. However they probably referred to bearings so that the means of obtaining the bearing to a target, possibly a bearing ring on top of the pillar, could be calibrated.
Lines 4, 5 & 6 would be needed to calculate the elevation the gun would be required to be set at to achieve the range to the target.
In 1889 the observer would have controlled the gun from along side the pillar. The permanent information on the pillar would save each practising unit from having to work it out themselves, and would enable firing results to be compared on a standard basis.
During WWII the principle of obtaining gun data, bearing and range, would have been the same, a range finder and a method of reading the bearing.
Below is a photgraph of the existing cannon racers.