At 10:00 h, a shot from "Cochrane" struck the bridge cabin, killing Admiral Grau and his adjutant, Diego Ferre. Command fell to Captain Elías Aguirre. By this time "Huáscar"'s stern was on fire since at least two more shells penetrated from the rear and shattered the rudder wheel (Cluny, pg. 230), and the forecastle was devastated too. Lt. Captain Gaona's gunners caused heavy casualties among the Peruvian crew: the Chileans were using Palliser type armor-piercing rounds, which exploded right after penetrating the hull.