My first IMC as well.

So I did a few calculations. If you line up 200m to the left, your 1500m swim to the first buoy will be 1513m (a2+b2=c2). If you line up to the right you better be fast.
If you have a natural tendency to fade left or right, start the opposite way and if you breath one side, make sure you can see everyone.

I fade right, breath right, and I can't see the buoy till I hit it.
So guess I'll be over in left field.

The rest I leave to the gods!

good luck

ps, don't drink the water anywhere near the start :)