History of the Peloponnesian War

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 harbor 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 harbor 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 harbor was not large.