Abstract
We present a calculation of the dimension of Nessie, as seen in the 1934 Wilson photograph, based on a comparison with the length of adjacent wind waves. The wavelength is estimated from modem results on wind waves and contemporaneous weather information. Quantitative comparison of Nessie and the wavelength scale is effected in a digitized version of the original photograph. Our estimate of the height of the neck above the water level is 1.2 m (4 ft), and other possible (subsurface) dimensions may be estimated proportionally. The object thought to be Nessie in the Wilson photograph is therefore of a dimension which warrants all the interest which it has received.