Not Hint - But just for info...

The little islet in the center of the harbor had multiple purposes.
On the far side of it one barely make out a sandbar.
Invading ships must come through the near side
A heavy chain stretched between the islet and the wharf
Hence ripping off the bottom of unwanted ships

The Islet also served as the home of the city's executioner, and is where he preformed his duties.

In the lower right corner (not shown well) is how we entered the harbor. Beautiful Motor/Sail


“Every time I open a bottle of wine, it is an amazing trip somewhere!” José Andrés