PJ2,
I have previously raised doubts about some of the surface current data produced by NOAA/OSCAR and hope that SHOM specialists onboard the "Pourquoi pas?" during its recent two prolonged periods in the search area have gathered as much surface current data as possible. If they have done that, they surely will be able to analyze the actuals against those produced by the OSCAR project and ultimately be able to produce more factual vectors and speeds for the first 7 days of June.
The "Pourquoi pas?" is currently berthed at Horta, Azores and is engaged in its programed research - tectonic plate movements. I understand it sails for Brest on 30 September. Enter 38.53283333, -28.62133333 into Google Earth will take you to Horta.
The vessel's position is updated by satellite each hour at H+30 and is plotted at:-
Localisation des navires océanographiques de l'IFREMER
mm43