Today I drove to Gullane in order to hike over to Aberlady Bay. There are two submarine wrecks that are only visible at low tide.

The two submarine wrecks are training versions of the WW2 X-craft midget submarines. In 1946 these two submarines were disposed of by mooring them in Aberlady Bay to be used as gunnery targets by the RAF

You can see the other one in the background