The NIGHTHAWK flights can be VH-60Ns, VH-46s, VH-53Ds or VH-3Ds. The VHF equivalent for 241.0 is 126.2. I've only heard it used once. They may be going encrypted on 241.0 eventually based on what I heard a few nights ago with NIGHTHAWK-12. I hear them much better than Mike does.
The MUSSELL flights can be heard with MUSSELL CONTROL on 292.2, occasionally on 287.6, 141.7 is their company freq.