The majority opinion here seems to be that the only suppressive fire that really is effective is that which nearly kills the enemy, which is to say aimed fire that barely misses the mark. Spray-and-pray makes sense for the first minute or so of a meeting engagement, but after that fire control needs to be asserted, not always easy to do in the noise and confusion. The distinction is to shift to disciplined fire at known or suspected enemy locations, not to fire indiscriminately in a general direction.
During my day in the Field Artillery we had "Immediate Suppression" fire missions, High Explosive rounds with Variable Time fuzes (HE/VT) fired at enemy Anti-Tank Guided Missile positions. The idea was to make the ATGM gunner flinch during his aim. That was back in the DePuy FM 100-5 days of the Fulda Gap scenario.
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