12-inch/45-caliber Mark 5 gun

12-inch/45-caliber Mark 5 Naval Gun
Mark 5 gun being hoisted aboard USS Connecticut
TypeNaval gun
Coastal defence
Place of originUnited States
Service history
In service1906–1930
Used by
  • United States Navy
  • Greek Navy
Wars
Production history
DesignerBureau of Ordnance
Designed1903[1]
ManufacturerU.S. Naval Gun Factory[2]
Specifications
Mass53 short tons (48 t)
Barrel length45 ft 0 in (13.72 m) bore (45 calibers)
Shell870 lb (390 kg)
Caliber12 in (305 mm)
Elevation-5° to +15°
Rate of fire2–3 rpm
Muzzle velocity2,700 ft/s (820 m/s)
Effective firing range20,000 yd (18,288 m) at 15° elevation
30,000 yd (27,432 m) at 47° elevation As coastal artillery

The 12-inch/45-caliber Mark 5 gun was an American naval gun that first entered service in 1906. Initially designed for use with the Connecticut-class of pre-dreadnought battleships, the Mark 5 continued in service aboard the first generation of American dreadnoughts.

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  2. ^ Cite error: The named reference history.navy.mil was invoked but never defined (see the help page).