San Marcos Airport (KHYI) Hays County (TX)
From The RadioReference Wiki
San Marcos Municipal Airport/KHYI
San Marcos Municipal Airport, KHYI, at an elevation of 597' (AMSL), serves the Hays and Caldwell County areas.
The airport serves as a Wing HQ for the Centex Wing of the Commemorative Air Force as well as the Col. John Stokes Memorial Library.
KHYI also houses the SWR-TX-435 Texas Hill Composite Squadron of the Civil Air Patrol. CAP HQ Callsign is "Texas CAP 5450."
Description Frequency KHYI Clearance 121.350 MHz AM CTAF/ UNICOM 123.050 MHz AM AWOS 120.825 MHz AM Commemorative Air Force Common 122.600 MHz AM