| EOC 4-inch 50 caliber | |
| Origin: | Great Britain |
| Type: | Naval gun |
| Is Ranged: | yes |
| Is Explosive: | yes |
| Is Artillery: | yes |
| Is Uk: | yes |
| Used By: | Republic of China Greece |
| Wars: | Balkan Wars World War I Greco-Turkish War World War II |
| Designer: | Elswick Ordnance Company |
| Design Date: | 1911 |
| Manufacturer: | Armstrong Whitworth |
| Production Date: | 1911 |
| Weight: | 4816sp=usNaNsp=us |
| Part Length: | 16.7sp=usNaNsp=us 50 caliber |
| Cartridge: | Fixed QF ammunition 57.7sp=usNaNsp=us |
| Cartridge Weight: | 31sp=usNaNsp=us |
| Caliber: | 4inches |
| Rate: | 10-12 rpm |
| Velocity: | 3000sp=usNaNsp=us |
| Breech: | Horizontal sliding wedge breech |
The EOC 4-inch 50 caliber was a British naval gun designed by the Elswick Ordnance Company for export customers in the years before World War I that armed warships of the Republic of China and the Greek Navy. These ships served in both World War I and later World War II.
The EOC 4-inch 50 caliber began life as a design produced by the parent company of Elswick, Armstrong Whitworth for export customers called the Pattern P. These guns did not serve aboard ships of the Royal Navy.[1]
The EOC 4-inch 50 caliber was constructed of an A tube and wire wound with a protective outer jacket. It also had a horizontal sliding-wedge breech and fired fixed quick fire ammunition.
EOC 4-inch 50 caliber guns armed coastal defense ships, destroyers and protected cruisers.