AV-HSI Experimental The AV-HSI (Horizontal Situation Indicator) enables essential course and glideslope guidance for ILS (Instrument Landing System) and Localizer
The 681201-1 OAT Probe Assembly will provide very accurate measurements of Outside Air Temperature (OAT) for inputs to the Air Data Computer and other airborne systems. The OAT Probe Assembly produces an output current proportional to absolute temperature.