| Name | Explanation | Examples | Pictures |
|---|---|---|---|
| U | Primary trainer Uchebnyj |
U-1, U-2, UPe-2 | 
 |
| UB | Multipurpose machinegun by Berezin Universal'ny Berezina |
UB | - |
| UBK | Multipurpose machinegun by Berezin, free-firing (wing mounted) modification
Universal'ny Berezina Kryl'evoj |
UBK | - |
| UBS | Multipurpose machinegun by Berezin, synchronized modification
Universal'ny Berezina Synkhronny |
UBS | - |
| UBT | Multipurpose machinegun by Berezin, turret modification
Universal'ny Berezina Turel'nij |
UBT | - |
| UkrVozdukhPut' | Ukrainian Society of Airways
Ukrainski Vosdukhni Put' |
- | - |
| UMA | Naval Aviation Management
Uprevlenie Morskoj Aviatsii |
- | - |
| USR | Special Works Management
Uprevlenie SpetsRabot |
See BICh-17 project | - |
| UT | Basic trainer Uchebno-Trenirovochny |
UT-1, UT-2, UT-3 Pe-2UT | 
 |
| UTI | Fighter Trainer Uchebno-Trenirovochny Istrebitel |
UTI-4, UTI-26, La-15UTI | 
 |
| UVVF | Management of the Military AirFleet
Upravlenie Voenno-Vozdushnogo Flota |
- | - |
| UVVS | Upravlenie Voenno-Vozdushnikh Sil Military Air Force Management |
||
