Which option describes the V/UHF modes that provide frequency hopping for jam resistance?

• A. Manual
• B. Maritime
• C. HaveQuick and SINCGARS
• D. SCAN

Answer: (C)

Frequency hopping spreads a transmission across many frequencies in a synchronized, pseudo-random sequence, so a jammer can’t lock onto and stay on the signal. HaveQuick and SINCGARS are the V/UHF modes built to do this. They continuously switch frequencies in concert between the transmitting and receiving ends, giving strong jam resistance and, in the case of SINCGARS, added encryption for secure communications. A mode that stays on a fixed frequency or merely scans across channels doesn’t inherently resist jamming, since a jammer can concentrate on the single frequency in use or simply fill the scanned range. Maritime refers to channel usage rather than an anti-jam hopping method, so it doesn’t provide the hopping capability on its own.