The areas with no features and just water will not likely turn out. I would recommend mapping the actual open water itself using 15% overlap and process it using our Flat Map Workflow. Then get the nearshore stuff as you normally would. All of the reconstruction is based on feature matching so if it is water and the reflections and the surface is changing it won't work. That is why water is the first thing we warn against in the Data Collection guidelines that are agreed to at the time of upload.