Towered · Class D surface area
Robert Gray Aaf (KGRK) radio calls
Fort Hood (killeen), TXICAO KGRK · FAA GRK
Robert Gray Aaf is a towered airport in Fort Hood (killeen), TX. You will taxi with Ground on 121.8 and work Gray Tower on 120.75, after listening to the ATIS on 124.9. The approach control is Gray Approach on 120.075, which is who you call for VFR flight following. The tower operates 24 hours.
The airport has a Class D surface area: two-way radio communication with the tower must be established before entering. Published hours: CLASS D SVC CONTINUOUS.
Frequencies
| ATIS | 124.9 |
|---|---|
| Clearance Delivery | 126.2 |
| GroundGray Ground | 121.8 |
| TowerGray Tower | 120.75 |
| CTAF | 120.75 |
| Approach / DepartureGray Approach | 120.075 |
Airport
- Runways
- 15 · 33
- Elevation
- 1,015 ft
- Tower hours
- 24 hours
- Position
- 31.067, -97.829
Towered airport with a Class D surface area
Sample calls at KGRK
Robert Gray Aaf has a Class D surface area: establish two-way communication with the tower before entering (AIM 3-2-5 b 3). A reply that uses your call sign, even "standby", establishes it; "aircraft calling, standby" does not. The calls below use runway 15; the tower assigns the runway in use on the day.
The aircraft is the AIM’s own example, Cessna Three One Six Zero Foxtrot; the squawk codes, altitudes and headings are illustrative. Frequencies, station names and runway numbers are this airport’s, from the FAA data.
- Listen to the ATIS on 124.9 first and note the letter; "with Information (letter)" on your first call lets the controller skip the weather (JO 7110.65 3-10-1).
- YouGray Clearance, Cessna Three One Six Zero Foxtrot, at the ramp with Information Alpha, VFR to the north, request clearance.
- ATCCessna Six Zero Foxtrot, Gray Clearance, maintain VFR at or below two thousand five hundred, departure frequency one two zero point zero seven five, squawk four six one two.
- YouAt or below two thousand five hundred, departure one two zero point zero seven five, squawk four six one two, Cessna Six Zero Foxtrot.
- YouGray Ground, Cessna Three One Six Zero Foxtrot, at the ramp with Information Alpha, request taxi, VFR departure to the north.
- ATCCessna Six Zero Foxtrot, Gray Ground, runway one five, taxi via Alpha, hold short of runway one five.
- YouRunway one five, taxi via Alpha, hold short of runway one five, Cessna Six Zero Foxtrot.
- The runway, any clearance onto a runway and every hold-short instruction are read back (AIM 4-3-18 a 9). Stay on Ground through the run-up and switch to Tower when ready (AIM 4-3-14 a).
- YouGray Tower, Cessna Six Zero Foxtrot, holding short runway one five, ready for departure, northbound.
- ATCCessna Six Zero Foxtrot, Gray Tower, runway one five, cleared for takeoff.
- YouRunway one five, cleared for takeoff, Cessna Six Zero Foxtrot.
- ATCCessna Six Zero Foxtrot, contact Gray Approach one two zero point zero seven five.
- Youone two zero point zero seven five, Cessna Six Zero Foxtrot.
- YouGray Approach, Cessna Three One Six Zero Foxtrot, two thousand climbing four thousand five hundred, request VFR flight following to the north.
- ATCCessna Six Zero Foxtrot, Gray Approach, radar contact, altimeter three zero zero one.
- YouAltimeter three zero zero one, Cessna Six Zero Foxtrot.
- Inbound: call the tower about 15 miles out, before the Class D boundary (AIM 4-3-2 a).
- YouGray Tower, Cessna Three One Six Zero Foxtrot, one five miles north, three thousand, with Information Bravo, landing Gray.
- ATCCessna Six Zero Foxtrot, Gray Tower, enter left downwind runway one five, report midfield downwind.
- YouEnter left downwind runway one five, report midfield, Cessna Six Zero Foxtrot.
- YouGray Tower, Cessna Six Zero Foxtrot, midfield left downwind, runway one five.
- ATCCessna Six Zero Foxtrot, runway one five, cleared to land, wind two seven zero at eight.
- YouRunway one five, cleared to land, Cessna Six Zero Foxtrot.
- The wind is information: acknowledged, not read back. Exit at the first available taxiway or as told, taxi clear of the hold-short markings, and change to Ground only when the tower says (AIM 4-3-21).
- ATCCessna Six Zero Foxtrot, exit at the next taxiway, contact Gray Ground one two one point eight.
- YouExit next taxiway, one two one point eight, Cessna Six Zero Foxtrot.
- YouGray Ground, Cessna Six Zero Foxtrot, clear of runway one five, taxi to the ramp.
If things change. The tower operates 24 hours. If you cannot raise it, check the frequency and volume, then squawk 7600, remain outside the Class D until you have the traffic flow, and watch for light signals (AIM 4-2-13).
Phraseology from AIM 4-2-3; 4-3-18 a 9; 4-3-14; 4-3-21; 4-4-7 b; 4-1-18 a 3; 3-2-5 b 3; 4-3-2 a. What TowerTalk grades against →
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Frequencies, runways and airspace from the FAA National Airspace System Resources (NASR) 28-day subscription, cycle effective Sep 3, 2026. Training use only. Always verify against a current Chart Supplement and sectional chart before flight; frequencies change. TowerTalk is not affiliated with the FAA. Report a discrepancy.
