all coded in and working......but I don't understand how to use it
The inner ring rotates but that's about all I know to do with it (uses the same keys as the heading bar and navmap draggable compasses - Q and E. Shift + Q or Shift + E causes it to rotate faster). I added a new button to the torpedo panel that controls the RAOBF visibility. Each scope (attack, obs, and UZO) has the ability to display the RAOBF. You can see the button in the screenshot below for the Obs scope:
Now all that needs to be done is to make graticules for it. Who's up for the task??