[fabianfred]

IIRC the RGB value of the sea shore is 30 for no surf and 31 for surf

I select the sea...then choose the select border as 1 pixel which gives a single pixel band around all the water edges...... change to RGB 30.....unselect ........select the sea again and unselect the rivers the rivers... then do a border again this tiome just having it for the sea coast....change to RGB 31