| Manufacturer | Latecoere |
| Model | Late 521 |
| Modification | Late 521 |
| Country | France |
| Years | 1935 |
| Type | Flying boat |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | 49.31 m |
| Length | 31.62 m |
| Height | 9.07 m |
| Wing area | 330.00 m2 |
| Zero fuel weight | - |
| Empty weight | 20493 kg |
| Maximum takeoff weight | 37993 kg |
| Normal takeoff weight | - |
| Flight duration | - |
| Engine | 6 Hispano-Suiza 12Ybrs |
| Power | 6 x 860 HP |
| Thrust | - |
| Maximum speed | 247 km/h |
| Cruising speed | 184 km/h |
| Rate of climb | - |
| Practical range | 3900 km |
| Service ceiling | 6300 m |
| Hovering ceiling | - |
| Crew | 6-8 |
