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emergency-signal : 23 phrases in 14 subjects |
| Automobiles | 3 |
| Aviation | 1 |
| Communications | 1 |
| Ecology | 1 |
| Electrical engineering | 1 |
| Electronics | 3 |
| Energy industry | 2 |
| Geology | 1 |
| Makarov | 1 |
| Measuring instruments | 1 |
| Security systems | 1 |
| Submarines | 1 |
| Technology | 4 |
| Telecommunications | 2 |