 The product name looks and sounds similar to "GE-Mark V", a turbine controller made by General Electric.GE developed the EDACS radio system based on its success with Marc V. 

These radios are seen as obsolete and there is only one known instance of this system operating in the U.S. today (Grant County, Oklahoma).The general category of this kind of trunked system is called, "Scan-based trunking."