Well its sure NOT anything new as Flyer had the first full systems allmost 30 years ago in the Whitbread (Now Volvo race)
Many basic handhelds give a VMG readout if you know were your going
We have and Ockam system and you dont want to know thats it worth about 25k BUT it does not really matter were you need to get it takes wind speed ,dirrection ,boat dirrection ect and if you want to add another module give a % of what you should be doing
We pretty much wing it and use the knotmeter as the Ockam cant really figure out the current and other boats
