| Manufacturer | Martin |
| Model | GMB (MB-1) |
| Modification | GMB |
| Country | USA |
| Years | 1918 |
| Type | Bomber |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | 21.77 m |
| Length | 13.66 m |
| Height | 4.43 m |
| Wing area | 101.67 m2 |
| Zero fuel weight | - |
| Empty weight | 2867 kg |
| Maximum takeoff weight | - |
| Normal takeoff weight | 4638 kg |
| Flight duration | - |
| Engine | 2 Liberty 12-A |
| Power | 2 x 400 HP |
| Thrust | - |
| Maximum speed | 169 km/h |
| Cruising speed | 148 km/h |
| Rate of climb | - |
| Practical range | 628 km |
| Service ceiling | 3140 m |
| Hovering ceiling | - |
| Crew | - |
