The PRC-119 employs which technique to prevent enemy lock-on?

• A. Encryption
• B. Frequency hopping
• C. Single channel
• D. Wideband

Answer: (B)

Frequency hopping is an anti-jamming technique where the transmitter and receiver rapidly change the carrier frequency across a defined set of frequencies in a pseudorandom sequence. This makes it hard for an enemy to lock onto the signal or jam it effectively, because they’d have to track the exact hopping pattern and synchronize with the timing. Since the radio spends only short moments on each frequency and hops to another, a narrow-band jammer or a radar lock-on can’t hold a steady target on a single channel. Encryption protects the content, but it doesn’t prevent detection or lock-on to the signal itself, and a single channel would be easy to lock onto while wideband spreads energy differently but doesn’t provide the same agile resistance to interception. So the technique used by the PRC-119 to prevent enemy lock-on is frequency hopping.