 |
| air observations: 46 phrases in 16 subjects |
| Aerohydrodynamics | 1 |
| Air defense | 2 |
| Artillery | 4 |
| Astronautics | 1 |
| Aviation | 1 |
| Construction | 1 |
| Ecology | 1 |
| General | 1 |
| Intelligence and security services | 3 |
| Meteorology | 4 |
| Military | 20 |
| Navigation | 2 |
| Physics | 2 |
| Remote sensing | 1 |
| Soviet | 1 |
| Technology | 1 |