UMK-3 means Tactical Environmental Support System / Shipboard Meteorological and Oceanographic Observing System in
Military
Similar to UMK-3
278 ACR - 278th Armored Cavalry Regiment
2AD - 2nd Armored Division
2E - Role 2 Enhanced
2IC - Second In Command
2LM - Role 2 Light Maneuver
2LT - Second Lieutenant
2M - Micro Miniature
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