Thread history

Thanks Chase. ATarget is a comparable but for other stuff. What i was looking for was something around another data structur. The above code snippet is way to much code for my taste. I thougth about to register the next ATarget on every ATarget and then simple ask the difference but it didn't work very well because i had to reorder the references to much. I'm looking for something that can handle ... update ATarget ... sort out the closest (bearing) ATarget ... and give the difference back ... I think i have to find a appropriate List/Tree structure for this.