I found an old chart. I'm guessing the hammer and
anvil is either fictional or else to the east side near
the sand bar.

"thunder" wrote

That's the spot. Do you have any charts of this area?

Sorry, but I couldn't find anything. Are you reading about a sea-battle?

"THE DOWNS is also the name of a roadstead in the English Channel off
Deal between the North and the South Foreland. It forms a favorite
anchorage during heavy weather, protected on the east by the Goodwin
Sands and on the north and west by the coast. It has depths down to 12
fathoms. Even during southerly gales some shelter is afforded, though
under this condition wrecks are not infrequent."