I believe it referenced the ground radar used to track the inbound aircraft and vector/guide them to the target. Like in "AN/TPQ-10 radar" ... it was used by Marine ASRT teams and was pretty accurate.
Marine A-6 squadrons used to regularly fly "beacon sorties" which were directly fragged by the local MAW. I think I got all that right ...![]()
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Makes sense to me - knowledges accrued
