Could somebody please explain me the differences between using the OBS and the Heading Indicator? As much as I could understand, once you tune into the VOR, the OBS starts to show how much deflection/ deviation is there. You then turn the OBS to align the needle which shows the direction (in terms of angles) that you need to fly to reach that VOR.
Does this mean that the OBS is the instrument to derive the direction, and serves no direct purpose in terms of heading? I.e. the Heading Indicator is the one that then should align be flying in that new direction, right?