The more expensive scanners would be nice, but not mandatory
... and the Us are in the UHF range.
Tom,
The answer to your question is yes, there is and yes, it can. Any scanner will do. Just be aware that if a mode other then analog is used on any of the below frequencies, and your scanner can not decode digital, then you'll be unable to monitor the traffic being passed - that's all.
(CTCSS 156.7, unless otherwise specified, if analog; or NAC 293 if digital)
I Call - 866.0125
I Tac 1 - 866.5125
I Tac 2 - 867.0125
I Tac 3 - 867.5125
I Tac 4 - 868.0125
NJI Tac 5 - 866.775
NJI Tac 6 - 859.7875
I Com - 866.875
U Call 40 - 453.2125
U Tac 41 - 453.4625
U Tac 42 - 453.7125
U Tac 43 - 453.8625
NJU Tac 4 - 470.2375 (186.2)
NJU Tac 5 - 470.0875 (173.8)
NJU Tac 6 - 472.875 (192.8)
NJU Tac 7 - 454.150 (136.5)
NJU Tac 8 - 454.625 (141.3)
SCANdal