This is a simple heading indicator that works in two modes - normal and target mode. (It only works for plane configuration)

Normal Mode

It just shows your current heading, if you want to know the heading in degrees just multiply the value by 10 (for example 25 is 250 degrees)

Target Mode

This mode will help you get to your target, just select the desired target, click on the "TRG Mode" label and try to match the lilac square with the white triangle on top, then your course will be directed to the target.

This is a simple installation made for demonstration purposes (can be rotated - yaw input + use the camera - throttle axis for camera zoom); if you like, you can of course use this in your creations.

Don't forget, use the tinker panel to scale; it doesn't work for rockets (only planes)!