GA PLT COMPLAINT ABOUT SFAR-50-2.

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COMPLEX SPECIAL USE AIRSPACE NOT UNDERSTOOD BY FSS PERSONNEL. WHEN FILING A VFR FLT PLAN FROM FMN TO LAS; ASKED BRIEFER FOR LATEST INFO ON GRAND CANYON SPECIAL FLT RULES AREA. BRIEFER DID NOT HAVE KNOWLEDGE OF SFAR-50-2. THIS RESULTED IN DIFFICULT PREFLT PLANNING TO NEGOTIATE CORRIDORS. PROB: ALTIMETER SETTINGS NOT AVAILABLE FROM GRAND CANYON AT NIGHT 12/88. THIS CAUSED DIFFICULTY IN COMPLYING WITH SFAR-50-2 WHICH SPECIFIES EXACT ALTS FOR COMPLIANCE E OF MT DELLENBAUGH. FSS (PRESCOTT) SAID GCN ALT SETTING IS UNAVAILABLE. PROB: SFAR-50-2 INSET IN LAS SECTIONAL IS OVERLY COMPLEX CAUSING DIFFICULTY FOR NON LCL PLTS. NEEDS SIMPLIFICATION. PLT WAS UNABLE TO OBTAIN LATEST (OR ANY) INFO ON SFAR-50-2 FROM FSS PERSONNEL WHILE FILING A VFR FLT PLAN IN FARMINGTON; NM. SFAR-50-2 INSET IN LAS SECTIONAL IS OVERLY COMPLEX AND DIFFICULT FOR NON LCL PLTS. SFAR-50-2 REQUIRES GCN ALTIMETER SETTINGS; BUT GCN ALTIMETER UNAVAILABLE FROM PRESCOTT FSS WHILE ENRTE 12/88. THE FACTORS CITED ABOVE MAKE COMPLIANCE WITH SFAR-50-2 VERY DIFFICULT FOR NON LCL PLTS.