Thank you Scott for the words of encouragement.
I am afraid that my rework of the coastlines/water has created a bunch of rework of airfield facilities and installations, not to mention roads and railroad lines.
I only wished that when I started I had the topos that I recently found for the Philippines. It was a folly to use the generated contour lines as the coastlines.
There are benefits, I have a better understanding of the geography and have found a method of actually placing maps and jpgs of created airfields without coordinates into the global mapper.
Back to the question. to not have shorelines at certain locations. Inputs please
Cheers