Class B
| airspace
| class B abbr. | |
| transp. mil., grnd.forc. | classe B |
| airspace abbr. | |
| transp. avia. geogr. | espace aérien |
| |||
| classe B | |||
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Class B : 26 phrases in 11 subjects |
| Aviation | 2 |
| Communications | 3 |
| Earth sciences | 1 |
| Electronics | 5 |
| Forestry | 1 |
| General | 1 |
| Life sciences | 1 |
| Materials science | 1 |
| Medical | 6 |
| Microsoft | 1 |
| Transport | 4 |