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NCR - Public Safety Interop

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 NCR - Public Safety Interop

Public Safety
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Feed Notes

This feed is a Uniden BCD996T monitoring NIFOG, MWCOG PMARS, and MWCOG RINS channels. The antenna site for the radio feed receiver is located at the northern most point in Farifax County (Virginia) located near the latitude - longitude coordinates of N 38.99872 and W -77.25443. 

This feed monitors Interop Channels as defined by the NIFOG document pubished by the U.S. Department of Homeland Security's Office of Emergency Communications. The National Interoperability Field Operations Guide (NIFOG) is a technical reference for radio technicians responsible for radios that will be used in disaster response applications, and for emergency communications planners. The NIFOG includes rules and regulations for use of nationwide and other interoperability channels, frequencies and channel names, and other reference material.
  • LOW BAND interop
  • VHF Public Safety Mutual Aid (non-federal)
  • VHF IR Common
  • UHF IR Common
  • VHF LE Common
  • UHF LE Common
  • 700 Interop Nationwide Channels
  • 800 8CALL/TAC post rebanded
  • 800 8CALL/TAC pre rebanded
* The NIFOG guide defines UHF MED CHANNELS but the Radio Reference Terms of Service prohibit broadcasting this type of traffic routinely. 

This feed monitors the NCR (National Capitol Region) P-MARS (Police Mutual Aid Radio System) channel. P-MARS was implimented* to provide greater connectivity between the regions dispatch centers.

* As of February 2000, the P-MARS repeater moved from 453.550 MHz to the new 800 MHz frequency.

An older, 39.620 MHz, frequency was depricated but is sometimes heard during roll call. Participating localities may include:

  • Alexandria City Police
  • Arlington County Police
  • Fairfax City Police
  • Fairfax County Police
  • Falls Church Police
  • Frederick Police
  • Herndon Police
  • Loudon County Sheriff
  • Maryland National Capitol Park Police
  • Maryland State Police
  • Metropolitan Police DC
  • Metropolitan Washington Airports Authority Police
  • Montgomery County Police
  • Prince George's County Police
  • Prince William County
  • Takoma Park Police
  • University of Maryland at College Park Police
  • Vienna Police
  • Virginia State Police

This feed monitors the Metropolitan Washington Council of Government's (MWCOG) allocated RINS* (Regional Inter-Service) channel frequencies using the common PL tone and the local PL tones, so only traffic from the surrounding area can be heard. The six (6) RINS frequencies are primarily used for Fire/EMS service interoperability within the region utilizing a common PL tone, though any public safety agency member of MWCOG may use them.

* RINS channels can also be used for local MWCOG participating jurisdictions VRS (vehicle repeaster systems) using the common PL tone or for T/A (talk-around) needs using any dis-similar PL tone. The default modulation is conventinal analog, however digital is permitted for T/A locally.

The National Capital Region (NCR) was created pursuant to the National Capital Planning Act of 1952 (Title 40, U.S.C., Sec. 71). The Act defined the NCR as the District of Columbia; Montgomery and Prince George’s Counties of Maryland; Arlington, Fairfax, Loudoun, and Prince William Counties of Virginia; and all cities now or here after existing in Maryland or Virginia within the geographic area bounded by the outer boundaries of the combined area of said counties.

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The National Capital Region (NCR) is one of the most important political and military areas in the US. The NCR is defined as the District of Columbia (Washington); Montgomery and Prince George’s Counties of Maryland; Arlington, Fairfax, Loudoun, and Prince William Counties of Virginia. Within these areas there are many Local Government, Law Enforcement, Fire/Rescue and Military facilities and personnel which need to be in constant communication with each other using the various channels featured on this feed. However, due to the nature of the unique mutual aid activities of entities within the NCR, throughout the year many agencies routinely host exercises and drills that put hundreds or thousands of First Responders to the test and simulate everything from fires to terrorist attacks. During such times many of the NIFOG and MWCOG Interop frequencies will have increased activity that local people may want to listen to. To avoid dangerous confusion that could lead the average citizen to fear there is a real situation in the listening area, this feed may NOT be connected during such events/activities. We apologize in advance for any inconvenience this may cause.  This feed will be denoted as "Not Active" when offline.