[1] Although neither side sustained significant losses (according to general descriptions, it consisted in distant and ineffectual cannonade between the two fleets[2]), the Ottomans withdrew after three failed attempts to break through the Greek fleet, and the battle is considered a Greek victory.

[1] The Ottoman fleet of eighty-four vessels under the command of Kara Mehmet Pasha (also known as Mohammed Ali) was sent to destroy Greek forces at Hydra and Spetses and to relieve the besieged Ottoman garrison at Nauplia (Nafplio).

[1] Miaoulis based his strategy on that of an ancient Greek admiral Themistocles in the Battle of Salamis, hoping to lure the superior Ottoman fleet into a narrow strait in order to deprive it of its freedom of manoeuvre.

[1] He divided his forces (sixteen fireships and fifty-six vessels) into three squadrons, one of which was to lure the Ottomans into the straits, another to engage them if they fell into the trap, and the final one was to defend the Greek coast between Spetses and the Peloponnesus in case the Ottomans would want to land ground troops.

[3] On 10 September, the Ottomans attempted another breakthrough, but once again retreated before the Greek trap was sprung.