 |
| Threshold lights: 12 phrases in 7 subjects |
| Airports and air traffic control | 3 |
| Aviation | 4 |
| Makarov | 1 |
| Medical | 1 |
| Medical appliances | 1 |
| Quantum electronics | 1 |
| Technology | 1 |
|
| Threshold lights: 12 phrases in 7 subjects |
| Airports and air traffic control | 3 |
| Aviation | 4 |
| Makarov | 1 |
| Medical | 1 |
| Medical appliances | 1 |
| Quantum electronics | 1 |
| Technology | 1 |