They know the spring season in Annapolis by the scent of burning socks. In San Francisco it is heralded by the San Francisco Speed Sailing Management opening their "speed box." According to this article the trimaran Geronimo took a ceremonial run through the box...her crew claims that she was able to reach a very scary 38 1/2 knots during her sail. The trimaran was in San Francisco for several days preparing for an ideal weather window to break the San Francisco to Yokohama speed sailing record. When you're riding a sled that's topping out near 40 knots, I can't imagine being too concerned.