Golly., there are a lot of 'medical/hospital' entries in that AIH !
It seems to me that quite a few of those entries are actually VFR waypoints that (for reasons unclear) still have a 'Y' ICAO prefix,
eg. "Majura Training Area', 'Stag Tanker Mooring Platform', 'Walcott Inlet', 'Roper River Aqua Farm', 'Blenco Falls', 'Beaver Reef', 'North Solitary Island', ...