Air Navigation Systems
| Standards and Procedures
| air navigation system | |
| avia. Canada | système de navigation aérienne |
| standards and procedures | |
| fish.farm. | normes et procédures |
| |||
| système de navigation aérienne | |||
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Air Navigation Systems : 32 phrases in 6 subjects |
| Astronautics | 1 |
| Aviation | 25 |
| Law | 1 |
| Natural sciences | 1 |
| Technology | 1 |
| Transport | 3 |