DURING TRAINING FLT WITH INEXPERIENCED FLC; ACFT HAD NUMEROUS NAVAID RADIO PROBS. ACFT WAS LANDED AT OFF LINE ARPT TO CHK RADIOS. AFTER LNDG AND RESETTING CIRCUIT BREAKERS; ALL SYS WERE BACK TO NORMAL.

Narrative

ENRTE ON RADAR VECTORS TO SJJ TO LAND AT MOBILE DOWNTOWN. LEAVING 10000 FT MSL; TUNED RADIO TO (112.8) BFM AND SIGNAL APPEARED UNRELIABLE. CONTINUED WITH RADAR VECTORS (ZHU) TO S FOR SET UP VECTORS TO MOB. CURRENT COURSE CROSSED OVER BFM. XING BFM; TUNED IN ILS RWY 32 BFM (108.5) WITH NO SUCCESS. TURNING N; 108.5 STILL UNUSABLE. CONTINUED TO ILS RWY 32 MOB TUNING 111.5 WITHOUT SUCCESS ONCE AGAIN. ELECTED TO TAKE VECTORS BACK TO S WITH ZHU. UPON TURNING N; ATTEMPTED TUNING OF RWY 32 ILS BFM (108.5) AND RWY 32 ILS MOB (111.5) WITHOUT SUCCESS. TOLD CTLR WE WOULD ATTEMPT VOR RWY 18 DOWNTOWN BUT VOR SIGNAL REMAINED UNRELIABLE. ON THIS ATTEMPT; WE SAW MOBILE REGIONAL VISUALLY BUT WAS TOO HIGH TO MAKE VISUAL APCH AND LNDG. CAPT ELECTED TO VECTOR S AND SET UP FOR VISUAL APCH AND LNDG AT MOB DUE TO UNRELIABLE ACFT NAVAIDS. TO DIVERT TO DESIGNATED ALTERNATE (NEW ORLEANS) WOULD HAVE REQUIRED US TO ENTER IMC CONDITIONS WITH UNRELIABLE NAVAIDS. AFTER SHUTDOWN; WE RECYCLED ALL NAVAID CIRCUIT BREAKERS. WE THEN GND TESTED VOR (SEMMES) AND ILS RWY 32 MOB (111.5) WITH SUCCESS. ELECTED TO LAUNCH BACK TO BFM ONCE APCH CTL WAS UP AND OPERATIONAL AND COULD PROVIDE AN ASR IF ILS/VOR STILL QUESTIONABLE.