Knowledge on the marine boundary layer is of importance for the prediction of the optical image quality obtained from
long range targets. One property of the boundary layer, that can be studied rather easily by means of optical refraction
measurements, is the vertical temperature profile. This profile can be compared with the profile, as predicted by the
generally accepted Monin-Obukhov (M-O) similarity theory, such as applied in the EOSTAR model, developed at TNO.
This model also predicts the atmospheric turbulence profile, for which a validation can be done by means of scintillation
measurements. Along these lines we explored the data from the year-round FATMOSE experiment, arranged over the
False Bay (South-Africa). Because of the large amount of refraction and scintillation data, supported by extensive data
from various local weather stations, we could select the conditions for which the M-O theory is valid and determine the
particular conditions where this theory is failing. In the paper model predictions (including Angle of Arrival calculations
in non-homogeneous conditions along the 15.7 km path) and associated refraction and scintillation measurements are
shown for a representative variety of conditions.