AN/WQN-2 means Doppler Sonar Velocity Log System in Military
Similar to AN/WQN-2
2-D - Two-Dimensional201MIB - 201st Military Intelligence Battalion
20SCVI - 20th South Carolina Volunteer Infantry Regiment
21CLW - 21st Century Land Warrior
21CLWTLD - 21st Century Land Warrior Top Level Demonstration
24 MEU - 24th Marine Expeditionary Unit
24NAF - 24th Numbered Air Force
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