NMAC AT UNCONTROLLED ARPT INVOLVING ILS APCHS AND OPPOSITE DIRECTION RWY IN USE.

Narrative

IN BTWN STUDENTS I WAS WATCHING LCL TFC AT OXC. AS IS CUSTOMARY; EVEN THOUGH RWY 18 WAS ACTIVE; PEOPLE WERE PRACTICING THE ILS 36 APCH. I OBSERVED AN SMA X TAKING OFF RWY 18. AT THE SAME TIME AN SMA Y FOLLOWING THE ILS 36 ON A 1/4 MI FINAL. THE SMA Y APPEARED TO BE CONTINUING FOR LNDG. AT APPROX 100' AGL BOTH ACFT APPEARED TO NOTICE EACH OTHER AND TOOK EVASIVE ACTION. IT APPEARS THAT PERMITTING CONVERGING APCHS TO MINIMUMS AT UNCTLED FIELDS WILL EVENTUALLY LEAD TO MORE MIDAIRS (EG; SAN LUIS OBISPO SEVERAL YRS AGO). AS AN INSTR I FEEL MORE VULNERABLE TO THIS SITUATION BECAUSE OF MY CONTINUOUS USE OF UNCTLED AIR FIELDS. PLT EDUCATION AND ENFORCEMENT SHOULD STRESS SAFETY AT UNCTLED FIELDS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: RPTR EXPRESSED GREAT CONCERN ABOUT THE FREQ OF THIS NMAC SITUATION. HE IS A FLT INSTR AND FEELS STUDENTS IN TRNING HAVE ENOUGH TO CONSIDER W/O THIS DANGEROUS SITUATION OF HEAD ON TFC. FEELS AIM OR FAR'S SHOULD BE SPECIFIC ABOUT LIMITS FOR PRACTICE APCHS AT UNCTLED ARPTS.