NavList:

Brad, regarding your calculation of the dip with formulae mentioned in Freiesleben (1950): Note that the temperature difference can be positive or negative. I understand that you should use in these equations for the temperature difference T of air at eye level minus T of sea, but you better verify it again. You do not have T at eye level. I guess that the mean of the air temperatures measured by the two buoys may possibly be an approximation of it. This shows that the temperature differences, and, depending on the wave heights, also the height of eye will likely contain a considerable part of uncertainty. As a consequence of this one may expect heavily scattering differences when comparing calculated with measured dip values.

Again, sorry for having given before a misleading information regarding Sunset Science II. This publication explains properties of the dip but does not contain an explicit dip formula as you were looking for and now found in the publication from Freiesleben.

Marcel