i always use the following resources as nice bullseye primers for folks. different game but relevant information.
also a trainer here:
http://www.185th.co.uk/squad_info/training/basic_n&b_bullseye.htm
and finally - here is a page that helped me in my early days:
http://www.virtualnavairops.com/wiki/index.php5?title=Navigation
Bullseye Navigation
“Bullseye” is a reference point from which positions are reported. It may be a point on the ground, nav-aid, the ship, or any point the controller assigns.
Use the following pictures as an example:
Your position is on the tail of the needle -270 Radial at 100 (in red) the outer ring of the compass is your distances -100 miles
The position you wish to go to is 150 Radial at 50 miles (halfway to the outer ring in yellow, if the outer ring is 100 then 1/2 to the outside is 50)
Visualize a line from your position to the desired position (red dashed)
Move the line (parallel) to the centre of the compass (red solid line)
Where the red solid line crosses the outer compass ring is the course to the new positions (110 degrees)
Fly that heading to reach the new position (corrections may need to be made enroute)