What aircraft is this on?
As another person mentioned, there can be significant differences from one aircraft or manufacturer to another. I'd suggest checking with your training provider or the aircraft manufacturer on this.
In the King Air, you fly a precision approach in APP or APP/VNAV. Non-precision approaches are flown in NAV or NAV/VNAV.
Also, the PL21 in the King Air only has green needles.....green for FMS, green for VOR/LOC. None of that silly color coded stuff so you can tell when a change happens. Confusing, huh?