Conditions? Looks like the mono they passed was pretty well heeled over but the water itself didn't appear to be that chopped up.
This is the location where they sailed from, its a flatwater spot and home to some of the Nacra guys:
https://www.google.nl/maps/place/He...!1s0x47c45190d5703db7:0xf54b59f9d1e0c857 Wind's where not that strong last Sunday, I'm guessing something like 14-18kts (rough guess).
