Thaks for the comment MattB. The sea depth drops quite suddenly. During low tide one can walk about 400m away from the beach, then wade some more as you can see from those herons in the sea. Then the depth suddenly increases.

That's such a crazy image but good ! Those people could actually be on the deck and it wouldn't look weird but they must be approx 800 yards from the behemoth of a ship. I wonder what the depth is there? it almost looks like it's going to be beached.