So who gets out the GPS (with the VMG function) and actually plots the chart for their catamaran? Anyone? Of course you'd need to mount a compass to utilize the findings. Is a compass class legal in most catamaran classes for buoy racing?

We raced a PHRF mixed fleet event last weekend and noticed the wind heading posted at every start.

From Hobie rules; "The use of navigation and speed
metering equipment is illegal unless specifically
allowed in the individual boat rules or by the Notice
of Race for the particular event or regatta."
I've heard the wind heading will be posted at the 18/20 Nationals but nothing in the NOR allowing compasses. Why then display wind direction?

Is the catamaran that much faster that you can "feel" VMG and it's not worth plotting, whereas changes in a larger/slower boat are more subtle and therefore less apparent?