Massachusetts State Police Ch. 1 42.44 Emergency and Tactical Ops Ch. 2 42.34 Troop A and Car-Car in Western Mass Ch. 3 42.40 Troop C Ch. 4 42.50 Troop D and Car-Car in Western Mass Ch. 5 42.54 Headquaters Units/Command/Detectives/Car-Car Ch. 6 42.46 Troop B and Car-Car in Eastern Mass Ch. 7 42.42 Detectives/Surveillance/Radar Patrols Ch. 8 44.74 Governor's Auto Theft Strike Force Ch. 9 44.90 Governor's Auto Theft Strike Force/Car-Car on Mass Pike Also used by Radar units is 42.38 the CTCSS for all but Ch. 8 & Ch.9 are 141.3, Ch.8 and 9 are CSQ only -/Vuarnet International/- 617/527.oo91 24oo-16.8k HST/V32bis