I'll try to get on if its in Sim mode.
Those little red arrows are a bit too much of a disadvantage for sneaking up on the enemies in Realistic. Sim is really not as difficult as it seems, just takes a bit getting used to. After that, you'll never want to go back to Realistic. I thought Realistic was the best way to go until I got sucked into a few Sim games, now I'll never go back. I don't even have a HD TV! I can't even check my six right now with my Thrustmaster.
Sim is so much more satisfying.