Islandlad,
I mentioned this on another thread. In the book it mentioned that on a modern synthetic display, the ship couldn't be seen. Then along came an aged analogue world operator who switched the display to raw radar, fiddled with the gain, sig. noise ratio and other controls, and there in the middle of the wave top clutter was a hole where the ship was. I now understand that it is possible to enhance /attenuate the ships returns so that it blends into the wave returns, regardless of the sea state.