Combat Air Patrols

The Combat Air Patrol (CAP) covering Washington D.C. and/or the Thurmont (Camp David) area is known as the Guard Dog CAP. Notices about CAPs can be found here - look at entries marked ZDC in the facility column. The sector map can be seen at the right (click to enlarge.

ZDC Sector map for CAP

Frequencies

Following are frequencies that may be used when the GUARD DOG CAP (District of Columbia - Naval Support Facility Thurmont "Camp David"} is active. Please note that not all frequencies are used during every CAP, in particular those labeled Noble A2A (air to air) --

All modes are AM unless otherwise noted.

• 121.5000 VHF Guard
• 135.5250 Potomac Tracon
• 139.7000 NORAD Huntress
• 143.8250 HMX-1 MCAF Quantico VA A2A (FM Mode)
• 226.7500 Noble A2A
• 228.1500 Guard Dog AR
• 228.9000 NORAD Huntress
• 234.8000 121st DC ANG Ops Discrete
• 238.1750 121st DC ANG Aux 5
• 247.0500 Guard Dog AR
• 247.5000 Guard Dog AR
• 259.9000 Noble (Barnes) A2A
• 260.9000 NORAD Huntress
• 263.2000 Noble A2A
• 265.8000 HMX-1 Common
• 267.5000 Noble A2A
• 268.2000 Noble A2A
• 268.5250 Noble A2A
• 269.5000 Potomac Tracon DCA Approach and Departure DAILY
• 273.9500 HMX-1 A2A
• 276.4000 HMX-1 OPS
• 277.1750 HMX-1 Control
• 277.4500 Noble A2A
• 283.7000 Noble A2A
• 285.2250 121st DC ANG A2A
• 293.3000 Noble A2A
• 294.7250 Noble A2A
• 298.6000 Cosmic A2A
• 318.9000 HMX-1 OPS
• 319.1750 121st DC ANG Aux 7
• 328.5000 Noble A2A
• 350.2500 Potomac Tracon Guard Dog CAP
• 363.9000 Noble A2A
• 364.2000 NORAD Huntress AICC
• 370.9750 Noble A2A
• 373.8250 Noble A2A
• 375.0000 Quantico Helipad
• 379.8000 Noble A2A

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