

Originally used as secondary weapons on ships of the late 19th century. In the 1930s guns removed from scrapped warships were reused on auxiliary ships.
Construction was built-up with a screw breech.
| Designation | 138.6 mm/45 (5.46") Models 1884, 1888, 1891 and 1893 |
|---|---|
| Ship Class Used On | Charles Martel, Carnot, Jauréguiberry, Masséna, Bouvet and Charlemagne classes |
| Date Of Design | 1888 / 1891 / 1893 |
| Date In Service | about 1890 / 1895 / 1897 |
| Gun Weight | about 4 tons (4.1 mt) |
| Gun Length oa | N/A |
| Bore Length | about 272.7 in (6.927 m) |
| Rifling Length | N/A |
| Grooves | N/A |
| Lands | N/A |
| Twist | N/A |
| Chamber Volume | N/A |
| Rate Of Fire | about 4 rounds per minute |
| Type | Separate |
|---|---|
| Projectile Types and Weights | AP: 80.5 lbs. (36.5 kg) HE: 69.4 lbs. (31.5 kg) |
| Bursting Charge | N/A |
| Projectile Length | N/A |
| Propellant Charge | N/A |
| Muzzle Velocity | AP: 2,379 fps (725 mps) HE: 2,510 fps (765 mps) |
| Working Pressure | N/A |
| Approximate Barrel Life | N/A |
| Ammunition stowage per gun | N/A |
Data from:
- "Navy and Army Illustrated Annuals, Volume VI - 1898"
- "Naval Weapons of World War Two" by John Campbell
- 06 April 2006
- Benchmark
- 28 March 2012
- Updated to latest template