1. Beta is the course of the boat with respect to the true wind . 2. The first column indicates the course as an angle off the true wind . 3. In this figure, the apparent wind and the true wind are at right angles. 4. "In 16 knots of true wind , we're moving at full speed, " said Russell-Smith. 5. Thus its velocity made good downwind will be equal to the velocity of the true wind . 6. The true wind is assumed to be equal to 1 in order to simplify the formulas. 7. Note that the true wind is added to the head wind created by the boat's speed. 8. Bertrand said gauges on the mast showed the true wind at 20-22 knots at one point. 9. Bertrand said gauges on the mast showed the true wind at 20-22 knots when the hull snapped. 10. That is, the yacht was moving faster than the wind although the true wind was behind it.
