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