The Eight Books of Thucydides' History, translated by R. Crawley.
This was the termination of the action at Naupactus. To return to Demosthenes and Eurymedon: the Thurians having now got ready to join in the expedition with seven hundred heavy infantry and three hundred darters, the two generals ordered the ships to sail along the coast to the Crotonian territory, and meanwhile held a review of all the land forces upon the river Sybaris, and then led them through the Thurian country. Arrived at the river Hylias, they here received a message from the Crotonians, saying that they would not allow the army to pass through their country; upon which the Athenians descended towards the shore, and bivouacked near the sea and the mouth of the Hylias, where the fleet also met them, and the next day embarked and sailed along the coast touching at all the cities except Locri, until they came to Petra in the Rhegian territory.
Meanwhile the Syracusans hearing of their approach resolved to make a second attempt with their fleet and their other forces on shore, which they had been collecting for this very purpose in order to do something before their arrival. In addition to other improvements suggested by the former sea-fight which they now adopted in the equipment of their navy, they cut down their prows to a smaller compass to make them more solid and made their cheeks stouter, and from these let stays into the vessels' sides for a length of six cubits within and without, in the same way as the Corinthians had altered their prows before engaging the squadron at Naupactus. The Syracusans thought that they would thus have an advantage over the Athenian vessels, which were not constructed with equal strength, but were slight in the bows, from their being more used to sail round and charge the enemy's side than to meet him prow to prow, and that the battle being in the great harbour, with a great many ships in not much room, was also a fact in their favour. Charging prow to prow, they would stave in the enemy's bows, by striking with solid and stout beaks against hollow and weak ones; and secondly, the Athenians for want of room would be unable to use their favourite manoeuvre of breaking the line or of sailing round, as the Syracusans would do their best not to let them do the one, and want of room would prevent their doing the other. This charging prow to prow, which had hitherto been thought want of skill in a helmsman, would be the Syracusans' chief manoeuvre, as being that which they should find most useful, since the Athenians, if repulsed, would not be able to back water in any direction except towards the shore, and that only for a little way, and in the little space in front of their own camp. The rest of the harbour would be commanded by the Syracusans; and the Athenians, if hard pressed, by crowding together in a small space and all to the same point, would run foul of one another and fall into disorder, which was, in fact, the thing that did the Athenians most harm in all the sea-fights, they not having, like the Syracusans, the whole harbour to retreat over. As to their sailing round into the open sea, this would be impossible, with the Syracusans in possession of the way out and in, especially as Plemmyrium would be hostile to them, and the mouth of the harbour was not large.
Reference address : https://www.ellopos.net/elpenor/greek-texts/ancient-greece/thucydides/history-7.asp?pg=20