Frequencies that used to be allocated to Differential GPS (DGPS) are now being used by government services like law enforcement and emergency services.

Do you use DGPS equipment in the 400 MHz band?  Do you use or supply equipment which uses DGPS technology?
If you operate your DGPS equipment on these frequencies, you may be disrupting or preventing critical public safety services from carrying out their jobs.

  • There's some important information on licenses for DGPS:  READ HERE
  • For a list of RSM Approved Radio Engineers and Certifiers:  CLICK HERE
  • For info on 450-47 mhz frequencies: download the attached


Not sure if you're operating your DGPS legally: Speak with your authorised SITECH dealer - 0800 474 8324 or email