Good travel up the French drainage with 10 to 25cm on the march 24 rain crust up to TL. Slope up to the Robertson sir Douglas col is largely bare rock. We followed steep snow up climbers right, but snow could be avoided.
Robertson glacier had a thin breakable crust from wind effect which made skiing challenging. Lots of avi debris to get thru or try to avoid below the glacier.
March 24 crust is 15cm thick at 2000m.