2/25/09, 6999 LSB, between 1415-1530 UTC, heard two radio checks, brief QSOs between two OM, one YL, standard MARS protocol, "AAA" call sign prefixes (Alpha-Alpha-Alpha). Seems to be Region 2, only location heard mentioned was Pensacola, FL. Ops indicated they were hearing only weak signals from each other, but all three were clearly audible here with indoor antenna. (N. Central TX)