Back in April of 2010 I asked for some help in confirming some of the new UHF Coast Guard activity that has been monitored recently. There were reports that the Coast Guard helicopters in many areas are now carrying UHF land-mobile radios that are on various CG Nets in the 406-420 MHz band. The helicopters in the South Florida area were reported to be using NET 411, but the frequency was not known.
Recently a Coast Guard helicopter was heard in the South Florida area calling on 413.025 MHz, NAC293 and confirmed that this frequency is indeed NET 411. Here is a list of what I have confirmed in the UHF band so far. These UHF channels are usually P-25 using a NAC of 293 and simplex:
406.5000
406.5625
406.5750
406.6000
406.8000
406.8125
406.9750
407.6250
407.9250
407.9750
408.4000
409.0000
409.1875
409.2000
409.3500
409.8250
410.0250
410.3750
411.3750
411.7875
412.9750 - NET-409
413.0000 - NET-410
413.0250 - NET-411
413.0375
414.7625
415.6250
415.7750
415.8250
415.9250
416.2250
416.3875
416.4750
416.5500 - NET-4xx
416.5750
416.5875
416.6000
416.6375
416.7000
416.7125
416.8500
416.9250
416.9375
417.0000
418.3500
418.4375
418.4500
419.1250
419.6000
419.6500
419.8000
419.8250
419.8500
419.9750