GA SMA PLT GOT LOST ON FIRST SOLO CROSS COUNTRY AND HAD TO LAND TO FIND OUT WHERE SHE WAS. LANDED AT AFB AND HELICOPTER PLT GAVE BEARINGS HEADING TO FLY TO HOME BASE.

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DURING MY FIRST SOLO CROSS COUNTRY I INADVERTENTLY FOLLOWED THE WRONG HDG ON DG (CORRECT HDG WAS 014 DEGS; I FOLLOWED 140 DEGS). AFTER CLBING TO MY CRUISING ALT (5500') AND OPENING FLT PLAN WITH MARTINSBURG FSS; I BECAME CONCERNED WITH CLOSE TFC AND WAS NOT MARKING OFF CHKPOINTS. WHEN I DID LOOK DOWN I WAS OVER SUBURBS OF A CITY. I REALIZED I WAS LOST WHEN I SAW THE CHESAPEAKE BAY. I WAS UNFAMILIAR WITH THE DUAL/COM RADIOS THAT WERE IN MY ACFT AND HENCE WAS UNABLE TO CONTACT ANYONE. MY THOUGHT WAS TO LAND AND GET MY BEARINGS AS I REALIZED I COULD BE IN CTLED AIRSPACE. NOT BEING ABLE TO CONTACT ANYONE ADDED TO MY CONCERN (AT THIS POINT I WAS STILL ABOVE THE ARSA AT 5500'). I SAW A SMALL ARPT OFF TO MY RIGHT AND OVERFLEW THE RWY TO DECIDE THE ACTIVE RWY. I THEN SPIRALED DOWN AND ENTERED THE PATTERN ON DOWNWIND. WHEN I LANDED AND TAXIED UP TO A HANGAR; I REALIZED I WAS AT TIPTON AIR BASE; FT MEADE; MD. A HELI PLT SUGGESTED SOME COURSE HDGS BACK TO HOME ARPT OF FREDERICK; MD. I TOOK OFF AND WAS CAREFUL TO STAY BENEATH THE ARSA. AFTER CLRING ARSA I CLBED TO 2500' AND TRACKED THE VOR BACK TO FREDERICK. I COULD HAVE AVOIDED THIS SITUATION BY MARKING MY CHKPOINTS; DOUBLECHKING CORRECT HDG (FIRST AND FOREMOST!) AND BEING COMPLETELY FAMILIAR WITH EQUIP ON BOARD (RADIOS).