\(SL=\frac{2x}{S^{2}}Q_{\max}e^{-{(\frac{x}{s})}^{2}}\) (1)
\(Q_{\max}=109.8(WF\times EF\times SCF\times K^{{}^{\prime}}\times COG)\) (2)
\(S=150.7{(WF\times EF\times SCF\times K^{{}^{\prime}}\times COG)}^{-0.3711}\) (3)