HMA 23 Airship
| Type: | Hydrogen-filled Rigid Airship |
| Role: | Training Airship |
| Top speed: | 52 mph / 84 kph |
| Volume: | 942,000 ft3 / 26,700 m3 |
| Length: | 535' / 163.07 m |
| Diameter: | 53' / 16.15 m |
| Engine Type: | 4 250hp Rolls-Royce Engines |
| Manufacturer: | Vickers, Beardmore, Armstrong-Whitworth |
| Number Manufactured: | 4 |
| Country of Origin: | England |
| First Flight: | September 19, 1917 |
| Retired | December, 1919 |