Name        Environment A        Handset A  Environment B  Handset B Channel
----        -------------        ---------  -------------  --------- -------
DOD         Quiet                STU-III    Office         STU-III   POTS/STU-III
Navy        Aircraft Carrier CIC TA840      Office         STU-III   HF
Army        HMMWV                H250       Quiet          STU-III   Satellite Delay
Air Force   E3A AWACS            R215       MCE            EV M87    JTIDS