Military
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 1
Communication Breakdown; Situational Awareness
ATC Issue All Types; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued Advisory / Alert
ATC Equipment / Nav Facility / Buildings; Procedure
I was training a developmental on the D side at the time of the incident. Aircraft X came over from Sector 23 at 10000 ft. level flight headed towards a terrain block at 10600 ft. The aircraft was having a hard time checking on due to low radio coverage in that area at the lower altitudes. The R-side tried to relay through another aircraft to issue a climb to 11000 ft. The R-side heard the transmission over guard but never got verification that Aircraft X received the relay to climb. No low altitude alert was issued once we talked to Aircraft X and issued the climb. Surrounding sector awareness of terrain could have helped avoid this conflict knowing they would have an easier time talking to that aircraft having better radio coverage.
ZAB Controller reported a military aircraft entering a higher MVA due to known area of communications limitations.