VOR: Out on a limb

It looks as though movistar has gone for the northerly option. They had one tack to the east at 0925GMT and then turned north again at 1040GMT. Since then they have been down to three knots, and are currently wandering about looking for the slightest breath of wind as the wriggle their way north towards the bigger wind. If they can do it, there is 20 knots of westerly wind about 130 nautical miles north which will give them the fastest ride on the shortest course. The problem is, how long will it take for them to get there.