Patuxent River Naval Air Station (Trapnell Field) frequencies
Patuxent River Naval Air Station (Trapnell Field) (NHK · KNHK) in Patuxent River, MD is a towered field, staffed 24 HRS++ MON-SUN, OTHER TIMES BY NOTAM.. Every frequency below is in the order you tune it, from the first call to the handoff on climb out. · Open on the map
All of Patuxent River Naval Air Station (Trapnell Field) — runways, frequencies, charts and live weatherWhen the KNHK tower is closed
The tower is staffed 24 HRS++ MON-SUN, OTHER TIMES BY NOTAM.. Outside those hours Patuxent River Naval Air Station (Trapnell Field) has no operating control tower: it becomes a self announce field on 123.7, and separation from other traffic is yours, not a controller's. Report your position and intentions on entry and on each leg of the pattern.
Runway lighting is often pilot controlled once the tower closes — check the KNHK airport page for the click sequence, and what to say on the radio.
Before taxi Patuxent
- Clearance 135.2
- Clearance delivery issues your IFR clearance, and at busier fields your VFR departure instructions and squawk code. Call before you request taxi, with the ATIS letter and your intended direction of flight.
Taxi & takeoff Patuxent
- Ground 120.6
- Ground control owns every taxiway and inactive runway on the field. Call for taxi with your position and destination on the field. You need an explicit clearance to cross any runway, including one that is not in use.
- Tower 123.7
- Tower owns the active runways and the surrounding surface area. Call before entering the surface area inbound, and hold short until you are cleared to take off or to cross.
Departure & arrival Patuxent
- App/Dep 120.05 (165-055 ABV 3000 FT), 121.0 (165-055 3000 FT & BLW), 127.95 (056-164 ALL ALTS), 135.625 (WHEN NHK APCH CLSD · secondary)
- One radar controller working both arrivals and departures — normal at a smaller TRACON. The same frequency takes your climb out and your inbound call.
Also
- Emergency 121.5
- 121.5 is the international emergency and distress frequency, monitored continuously. Declare on it if you are in trouble, and monitor it as a second radio when you have one free.
By procedure & sector (11 more)
| 243.0 | EMERG |
|---|---|
| 250.3 | APCH/P DEP/P (165-055 3000 FT & BLW) |
| 269.625 | APCH/S DEP/S (WHEN NHK APCH CLSD) |
| 281.8 | APCH/P DEP/P (165-055 ABV 3000 FT) |
| 314.0 | APCH/P DEP/P (056-164 ALL ALTS) |
| 316.125 | CD/P |
| 322.425 | ATIS |
| 336.4 | GND/P |
| 340.2 | LCL/S |
| 343.65 | LCL/P |
| 356.2 | PMSV METRO |
Every KNHK frequency, as one table
| Clearance | 135.2 |
|---|---|
| Ground | 120.6 |
| Tower | 123.7 |
| Emergency | 121.5 |
| App/Dep | 120.05 · 165-055 ABV 3000 FT |
| App/Dep | 121.0 · 165-055 3000 FT & BLW |
| App/Dep | 127.95 · 056-164 ALL ALTS |
| App/Dep | 135.625 · WHEN NHK APCH CLSD · secondary |
Frequently asked
What is the tower frequency at KNHK?
Patuxent River Naval Air Station (Trapnell Field) tower is 123.7, calling "Patuxent Tower". The tower is staffed 24 HRS++ MON-SUN, OTHER TIMES BY NOTAM..
What frequency do I use at KNHK when the tower is closed?
Outside 24 HRS++ MON-SUN, OTHER TIMES BY NOTAM., Patuxent River Naval Air Station (Trapnell Field) has no operating control tower and becomes a self announce field. Use 123.7 as the CTAF and report your position and intentions — there is nobody to clear you, so separation is yours.
What is the ground frequency at KNHK?
Ground control at Patuxent River Naval Air Station (Trapnell Field) is 120.6. You need an explicit clearance from ground to cross any runway while taxiing, including one that is not in use.
What is the approach frequency for KNHK?
App/Dep for Patuxent River Naval Air Station (Trapnell Field) is 120.05, working as "Patuxent" (165-055 ABV 3000 FT). Call inbound for flight following or to begin an instrument approach.
Where do I get my clearance at KNHK?
Clearance delivery at Patuxent River Naval Air Station (Trapnell Field) is 135.2. Call before requesting taxi, with the current ATIS letter and your direction of flight.
More about KNHK
Frequencies from FAA NASR. For planning and education only; always verify against official sources.