AN/UMK-3 means Tactical Environmental Support System / Shipboard Meteorological and Oceanographic Observing System in Military
Similar to AN/UMK-3
4ID - 4th Infantry Division4WW - The Fourth World War
503 RCT - 503rd Regimental Combat Team
517 PRCT - 517th Parachute Regimental Combat Team
596 SSC - 596th Signal Support Company
5CCGP - Fifth Combat Communications Group
5M - Machinery, Manpower, Material, Measurement, and Method
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