A long while ago I wrote a piece about surface multipath interference over the sea and recently, I had to explain that theory to someone. It was regarding their C band microwave access system which was not performing to their expectations. This system had one end station on the land and the other in the form of a tracking antenna mounted on a ship. Being a modern system, the signal level data could be recalled and graphed. In front of me I observed a great example of the fading phenomenon, so I dug out the old Excel model, tweaked the parameters for the atmospheric state of the day et voila:

The sea was a little unsettled on the day in question and the boat had several metres of heave. The multipath effects are clearly visible including impact of the heave that can be observed in the little oscillations in the last measured lobe. Beyond that, the signal diffracts due to the sea state causing the horizon to fall short of the smooth sea prediction.