The Spanish fleet, forming a V-shaped line of attack, enter into the bay at 10:00 hours, and formed two lines of battle: In the north, the ironclad "Numancia" and the frigates "Almansa" and "Resolución", while the frigates "Villa de Madrid", "Berenguela" and "Reina Blanca" moved south. The rest of the fleet, including the corvette "Vencedora," remained back near the island of San Lorenzo. The "Numancia", one of the largest ships at the time, went forward in order to begin the attack.