I don't think so, Portuguese and Spanish data seems to be almost removed from it, it cherry picks the age of sail past 1750 when the African Cape of Good Hope h

I don't think so, Portuguese and Spanish data seems to be almost removed from it, it cherry picks the age of sail past 1750 when the African Cape of Good Hope had been passed around 1448. Brasil, South America and India first endeavours don't even show up. Either the authors had restricted data sets or this is simply a partial representation that is clueless of the age of sail it wants to portray.