The Fritz X was an air-dropped, radio-guided missile used by the German air force as an anti-ship weapon with a 705-lb armour-piercing warhead.
Savannah was the first American ship to open fire against the German shore defences in Salerno Bay. She silenced a railroad artillery battery with 57 rounds, forced the retirement of enemy tanks, and completed eight more fire support missions that day. She continued her valuable support until the morning of 11 September 1943, when she was put out of action.
A radio-controlled Fritz X glide-bomb had been released at a safe distance by a high-flying German warplane and it exploded 49 ft (15 m) distance from Philadelphia. Savannah increased her speed to 20 kn (23 mph, 37 km/h) as a Dornier Do 217 K-2 bomber approached from out of the sun. The USAAF's P-38 Lightnings and Savannah's anti-aircraft gunners, tracking this warplane at 18,700 ft (5,700 m), failed to stop the Fritz X bomb, trailing a stream of smoke. The bomb pierced the armoured turret roof of Savannah's No. 3 gun turret, passed through three decks into the lower ammunition-handling room, where it exploded, blowing a hole in her keel and tearing a seam in the cruiser's port side. For at least 30 minutes, secondary explosions in the turret and its ammunition supply rooms hampered firefighting efforts.[4]
Savannah's crew quickly sealed off flooded and burned compartments, and corrected her list. With assistance from the salvage tugs Hopi and Moreno, Savannah got underway under her own steam by 1757 hours and steamed for Malta.
Savannah lost 197 crewmen in this German counterattack. Fifteen other sailors were seriously wounded, and four more were trapped in a watertight compartment for 60 hours. These four sailors were not rescued until Savannah had already arrived at Grand Harbour, Valletta, Malta on 12 September.” -
https://en.wikipedia.org/wiki/USS_Savannah_(CL-42)
