Have Quick

Have Quick (also HAVEQUICK, short HQ) is an ECM-resistant frequency-hopping system used to protect military aeronautical mobile (OR) radio traffic.

During development and the procurement of UHF radios, military planners did not require features to secure communications for aircraft and helicopters from jamming until the post-Vietnam War era.

The only other system requirements to achieve the desired anti-jam functionality were an accurate clock (for timed synchronization) and a microprocessor to add frequency hopping to existing radios.

The word of the day is loaded into the radio or its control unit to key the HAVE QUICK system to the proper hopping pattern, rate, and dwell time.

Improvements include HAVE QUICK II Phase 2, and a "Second generation Anti-Jam Tactical UHF Radio for NATO" called SATURN.