NHK - PATUXENT RIVER NAS (PAX) REVISED 03/15/05 The Naval Air Station (NAS) Patuxent River, Maryland, affectionately known as "Pax," was commissioned in 1943. It has since evolved into the center of excellence for naval aviation. With the consolidation, integration and collocation that has occurred throughout this decade, Pax River now hosts the full spectrum of acquisition management, research and development capabilities, air and ground test and evaluation (T&E), aircraft logistics and maintenance management. This distinctive synergy supports land based and maritime aircraft and engineering, T&E, integration, and life cycle support for ship/shore electronics. These combined capabilities are unique within the Department of Defense and ensure Patuxent River's status as an aviation leader working effectively to continue progress into the 21st century. The Naval Air Station complex includes the Webster Field Annex and Bloodsworth Island. The complex provides office space for the Naval Air Systems Command (NAVAIR), the Naval Air Warfare Center Aircraft Division (NAWCAD) and approximately 50 tenant activities. With the Base Realignment and Closure (BRAC) consolidations of 1991, 1993 and 1995 completed in 1998, nearly 19,100 people now wor k in support of the complex. Below are some of he frequencies in use at PAX. FREQUENCY: NAME: MODE: NOTES: CALLSIGN: INFO: VHF ATC 117.6 LEESBURG RDO AM (T) NHK 120.05 APP/DEP AM WEST BTN-7 (RDR) NHK 164-054 120.6 GND AM BTN-3 NHK SIMO W/336.4 121 APP/DEP AM WEST LO BTN-7 (RDR) NHK SIMO W/250.3 121.5 EMERG AM NHK 122.1 LEESBURG RDO AM (R) NHK 123.7 TWR AM BTN-4 NHK SIMO W/344.4 127.95 APP/DEP AM EAST BTN-6 NHK 055-163 SIMO W.314 133.9 WASH CTR APP/DEP AM LOW ALTITUDE NHK OT ctc WASH CTR 134.1 RDR AM BTN-10 NHK SIMO W/362.6 135.025 GCA AM (RDR) NHK 135.2 CLNC DEL AM BTN-5 NHK SIMO W/384.4 ATC UHF 243 EMERG AM NHK 250.3 APP/DEP AM WEST LO BTN-7 (RDR) NHK SIMO W/121.0 270.8 ADVISORY HIGH AM BTN-9 (RDR) BAYWATCH SIMO W/119.275 276.2 SFA ATIS AM BTN-2 NHK 281.4 WASH CTR APP/DEP AM LOW ALTITUDE NHK OT ctc WASH CTR 281.8 APP/DEP AM WEST BTN-7 (RDR) NHK 164-054 SIMO W/120.05 286 RDR AM NHK 301.2 GCA AM (RDR) NHK 305.2 GCA AM (RDR) NHK 314 APP/DEP AM EAST BTN-6 NHK 055-163 SIMO W/127.95 318.8 GCA AM BTN-11 (RDR) NHK 336.4 GND AM BTN-3 NHK SIMO W/120.6 340.2 TWR AM ALT NHK 344.4 TWR AM BTN-4 NHK SIMO W/123.7 348 GCA AM BTN-12 (RDR) NHK 356.2 PMSV METRO AM BTN-15 NHK 362.6 GCA AM BTN-10 (RDR) NHK SIMO W/134.1 384.4 CLNC DEL AM BTN-5 NHK SIMO W/135.2 400 NDB FM NHK CP/OPS/PTD 302.55 BASE OPS AM NHK CONFIRMED 119.275 ADVISORY AM LOW CHECK-IN, BTN-8or9 BAYWATCH SIMO W/354.8 & 270.8 & 369.9 122.2 FSS AM BTN-20 SIMO W/255.4 124.7 WASH APP AM BTN-19 SIMO W/338.2 126.2 WEBSTER TWR AM 138.625 USN TPS FM MAINT/LINE 138.975 AIRFIELD OPS FM 139.5 PUBLIC WORKS FM TRANSPORTATION 139.525 SATS/VX-21 FM MAINT/LINE STRIKE 142.075 GROUND ELECTRONICS FM G.E.M. 143.725 SUPPLY FM MAINT/LINE 151.715 UNIVERSAL FUEL FM 233.75 HMTC AM HOT MICROPHONE 235.725 RTPS AM TM 236.3 RWATS/HX-21 AM BASE BLACK JACK 249.65 V22 OSPREY AM BASE OSPREY OPS 249.95 HMTC AM HOT MICROPHONE 250.7 SATS/VX-21 AM BASE SALTY DOG 250.85 ADVISORY AM NW AREA, BTN-18 BAYWATCH ALERT/HELO ADVISORY 251.45 HMTC AM HOT MICROPHONE 255.4 FSS AM BTN-20 SIMO W/122.2 256.5 ADVISORY AM DISCRETE BAYWATCH 262.95 ECHO CTRL AM ADVISORY MONITORED ECHO/DATA/SHADETREE 264.15 USN TPS AM BASE TESTER 264.55 ECHO CTRL AM ADVISORY MONITORED ECHO/DATA/SHADETREE 268.65 HMTC AM HOT MICROPHONE 274.2 RWATS/HX-21 AM PROJECTS FREQ BLACK JACK 277 RTPS AM TM 285.2 NFATS/VX-20 AM OPS WATERBUG 289.8 RTPS AM TM 291.15 ECHO CTRL AM ECHO/DATA 291.3 ECHO CTRL AM ECHO 299.4 RTPS AM ADVISORY MONITORED TM 302.25 H-1 UPGRADES AM BASE 310.15 VQ-4 AM MAINTENANCE SHADOW 310.55 ECHO CTRL AM ADVISORY MONITORED ECHO 321.8 ECHO CTRL AM ECHO 325 HMTC AM HOT MICROPHONE 337.9 NRL FSD AM BASE RESEARCHER 338.2 WASH APP AM BTN-19 SIMO W/124.7 341.1 VX-1 AM BASE PIONEER 342.7 HMTC AM HOT MICROPHONE 350.9 RTPS AM TM 353.3 RWATS/HX-21 AM LAB TEST BLACK JACK 354.8 ADVISORY AM LOW, BTN-8 BAYWATCH SIMO W/119.275 358 WEBSTER TWR AM 360.4 HMTC AM HOT MICROPHONE 363.35 RTPS AM TM 369.9 ADVISORY AM CHECK-IN, BTN-17 BAYWATCH SIMO W/119.275 376.8 RTPS AM TM 381.7 ECHO CTRL AM ECHO 382.95 RTPS AM TM 387.9 FCLP AM PADDLES 392.675 RTPS AM TM 451.8 JOHNSON CTRLS FM-N Abbreviations GCA=Ground Control Approach RTPS = Real-Time Telemetry Processing System (RTPS) The freqs identified as RTPS are freqs that are assigned to the Real-Time Telemetry Processing System (RTPS) at PAX River, MD. Many sources (lists) of freqs for PAX have these freqs identified as belonging to a particular Aircraft Flight Test Program. That is not necessarily the case. These freqs are assigned by RTPS as needed. If a test aircraft flies on a regular basis, then they may very well keep the same freq for a long period of time making it appear that the freq has been permanently assigned to that particular test bed. But if that test program/aircraft goes down for a mod, goes away for off base testing, or any other reason it may not fly for a while, When it returns to flight status RTPS may very well have someone else using the old freq and give another freq to the returning aircraft/program. It has been observed in the past that 2 different flight test programs have used the same freq on a given day. For more detail about the RTPS, please refer to the link provided. http://www.nawcad.navy.mil/atlantic_ranges/telemtry/rtps.html