Vendee Globe 2009 was tracked in detail but map confuses me.

This map shows that Vendee Globe racers were tracked in detail. Do the positions and time make sense on a globe or a flat earth with 4 to 5 X as much Antarctica coastline as they tell us? How did they generate the data for this map? If Earth is flat, they must be making all of this up. Is there and way to confirm these positions or are they simply generated on a computer and simulated? Can actual physical positions of boats be confirmed by third parties? The next Vendee Globe race is 2016-- apparently enough people have enough money to do these races every 4 years. I don't see how it's even possible for sailboats to go into the southern part of these oceans and dodge chunks of ice. The whole thing seems like a massive hoax to promote a "globe" and cover up the real 60,000 mile Antarctic coast.