National Interoperability Field Operations Guide

National Interoperability Field Operations Guide (NIFOG) available from the U.S. Department of Homeland Security Office of Emergency Communications

The Office of Emergency Communications (OEC) publishes the National Interoperability Field Operations Guide (NIFOG) as a reference guide for public safety radio technicians and communications planners. The waterproof, pocket-sized guide (also available in PDF format) contains radio regulations, tables of radio channels, and technical reference information. If you are establishing or repairing emergency communications in a disaster area, this is a tool you should have.

What’s New in NIFOG Version 1.4

  • VTAC Repeater Channels
  • The DOJ 25 Cities Project
  • FEMA Regions – States and Territories
  • U.S. Coast Guard Rescue Coordination Centers
  • Cellular Telephone Emergency Response
  • Text Messaging
  • Line-of-sight Formulas

Updated content:

  • VHF Low-band interoperability repeaters and channel names
  • All channel tables list frequencies in the same order as ICS-205 and ICS-217 forms
  • An improved map showing where channel VTAC17 may be used, with county names
  • 700 MHz Interoperability Channels – frequencies have been added to the table
  • UHF MED channels – 12.5 and 6.25 channels added
  • RJ-45 wiring – crossover wiring added
  • VHF Marine Channel and Frequency tables
  • Revised the answer to the question “Don’t I need a license for these channels before programming them into radios?”
  • Revised the “Ground to Air working channel” in the table “Federal/Non-Federal VHF SAR Operations Interoperability Plan”

… and other minor additions and updates. Also, there are 4 PDF versions that you can download:

  • NIFOG 1.4 for personal printing
  • NIFOG 1.4 for professional printing
  • NIFOG 1.4 rotated for viewing
  • NIFOG 1.4 for PDAs (small displays)

If you just want the new and updated content listed above, download the “what’s new” file.

How to get a copy of the NIFOG

Public safety communications professionals and emergency communications specialists in volunteer organizations can receive reasonable quantities of NIFOGs at no charge by completing the NIFOG request form from
If you need NIFOGs by a particular date for a training event or conference, please specify the event and date in the “justification” block.

Businesses may purchase copies from the U.S. Government Printing Office – go to and type “Interoperability” in the “Simple Search” box.


NIFOG Mailing List

Join the NIFOG group for additional information and regular updates.

For further information

Please contact Ross Merlin at or 1-703-235-4085.