Complex sentence: One of the Chilean shots pierced the "Huascar" artillery turret, wounding the twelve crew members manning the 300-pound cannons; another shot perforated the armour just above the "Huascar's" waterline, cutting her left rudder chain and leaving her temporarily adrift.
Split into simpler sentences: One of the Chilean shots pierced the "Huascar's" turret, wounding the twelve crew members manning the 300-pound cannons. Another shot perforated the armour just above the "Huascar's" waterline, cutting her left rudder chain and leaving her temporarily adrift.