The Volvo boats are in port racing at Lorient. Groupama shows up on AIS but some of the yachts don't seem to be. Would all the Volvo boats be on AIS ?
They may not have them all switched on yet. Here is a handy site where you can keep an eye on things. http://www.volvooceanrace.com/en/racetracker/rdc.html
They should do as they are racing & strangely Groupama & Camper were showing but not the others.
Be wary of that race tracker. Last time it ran well behind the AIS & we nearly missed the winner.