The band of frequencies between 3 and 30 kilohertz.
- In some range, in some of the frequencies, very low frequencies she'll be 100 times as good as an ordinary hearer.
- A more potent RF weapon currently under development is the high powered very low frequency modulator.
- The Vanguard's towed sonar array is the Type 2046, which provides passive search capability and operates at very low frequency.
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