In the summer of 1940 invasion was a distinct possibility. It became urgent to mount guns at every possible landing area on the East and South coasts of England. Some field guns were deployed but armament for most of the Emergency Batteries came from the Royal Navy. They unearthed a collection of guns removed from scrapped warships in the 1920’s and 30’s.
The mountings were shipboard pedastal types. A steel plate holdfast was devised that could be adapted to any pedestal and anchored in quick setting concrete. Shields were made locally where possible or constructed in the nearest Royal Ordnance Factory. The 4 inch mobile equipments had their pedestals bolted down in suitable trucks and were held as mobile reserves.
It would be impossible to produce data for every combination of weapon and mounting used in the Emergency Batteries. The following list covers the main ones.
|6 inch Gun Mk 7||See 6 inch gun|
|6 inch Gun Mk 11||50 calibres long, velocity 2,920 feet/second, max range 22,100 yards|
|6 inch Gun Mk 11*||As Mk 11 but different construction|
|6 inch Gun Mk 12||45 calibres, similar to Mk 7 but lighter|
|6 inch Gun Mk 12A||As Mk 12 with longer chamber|
|6 inch Gun Mk 12B||As Mk 12 but bore diameter 5.985 inches|
|6 inch Gun Mk 13||50 calibres, MV 2,750 feet/second, max range 21,100 yards|
|6 inch Gun Mk 16||50 calibres, MV 2,980 feet/second, max range 22,400 yards|
|5.5 inch Gun Mk 1||55 calibres, MV 2,725 fett/second, max range 20,200 yards|
|4.7 inch Gun Mk 5*||45 calibres, MV 2,350 feet/second, max range 16,500 yards|
|4 inch BL Gun Mk 7||50 calibres, MV 2,820 feet/second, max range 17,000 yards|
|4 inch BL Gun Mk 9||45 calibres, MV 2,600 feet/second, max range 14,300 yards|
|4 inch QF Gun Mk 4||40 calibres, MV 2,200 feet/second, max range 13,000 yards|
|12 pdr Gun||See 12 pdr Coast Defence Gun|
|3 inch Gun||Naval records state 3 inch QF Mks 1 & 4. Probably 3 inch 20 cwt AA|
|3 pdr Gun||3 pdr Hotchkiss, 1,860 feet/second, max range 4,000 yards|