line -of-sight : 57 phrases in 13 subjects |
Astronomy | 2 |
Aviation | 5 |
Communications | 13 |
Construction | 2 |
Earth sciences | 1 |
Electronics | 9 |
General | 6 |
Information technology | 1 |
Nuclear physics | 1 |
Radio | 1 |
Technology | 1 |
Telecommunications | 2 |
Transport | 13 |