Third Test – same answer

Waypoint to west, with commanded heading in red towards 270 degrees.  Average heading towards 30 degrees, or 120 degrees to the right of the commanded heading.

Glider moved in the direction of the averaging heading, towards the northeast.  So no currents for third try,  Copernicus (the currents shown here) is a clear winner.

We are 150 km from our intended pick up point just south of the shipping lanes.  We are averaging 15 km/day.  So 10 days from today, Oct 13, is Tuesday, Oct 23.  Gives us a several day window for unexpected currents beyond that.

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