Bretschneider , golfhoogte, golfgroei
$$\frac{g \cdot H_{s}}{U^{2}} = 0,283 \tanh \left[ 0,530 \left( \frac{g d}{U^{2}} \right)^{0,75} \right] \cdot \tanh \left[ \frac{0,0125 \left(\frac{g F}{U^{2}}\right)^{0,42}}{\tanh \left( 0,530 \left( \frac{g d}{U^{2}} \right)^{0,75} \right)} \right]$$