What do the co-driver calls mean in Dirt 2

Simple calls:

Easy left/right: An easy, usually flat out corner.
Medium left/right: A tighter corner, a tap of the brake usually needed.
Hard left/right: A tight corner with a lot of brake needed.
Hairpin left/right: A very tight corner that turns in on itself, often turning 180 to go back alongside the road you entered the corner on. For these its best to brake hard before tapping the hand brake to slide to the exit.
90 left/right: A tight, right angled corner

Technical calls:


1 left/right: A very tight corner, almost a hairpin.
6 left/right: A very easy, almost imperceptible corner.
Hairpin is the same.