Taken from the project website (Accessed 2016-09-06):
This web site presents work done to collect, identify and locate ancient harbours and ports. It is based on a study of existing documentation. The result is a list of over 4000 ancient ports based on the writings of 71 ancient authors and over 100 modern authors, incl. the Barrington Atlas. A few “potential ancient harbours” from a nautical point of view, have been added, based on nautical guides/pilots used by modern sailors. [...]
This work is published in 4 volumes, all available in pdf versions, and most of it is reproduced on this web site:
Volume I gives the list of ports and a bibliography of ancient and modern authors. You can download the latest updated database as an xls table.
Volume II gives the French translations of the texts of the listed ancient authors.
Volume III provides some notes on ancient ships, on ancient measures and ancient maps, and on Claudius Ptolemy, on ancient structures and on some ancient ports.
Volume IV gives twenty stories about ancient mariners.