- Mark 27 torpedo
The Mark 27 torpedo was the first of the United States Navy 19-inch (48-cm) submarine-launched torpedoes. This electrically propelled torpedo was 125 inches (3.175 m) long and weighed 1174 pounds (534 kg). The torpedo employed a passive acoustic guidance system and was intended for both submarine and surface targets. Nicknamed "Cutie"  by submarine crews, the Mark 27 entered service in 1944. The torpedo was classified as obsolete in the 1960s.
- Kurak, Steve (September 1966). The U. S. Navy's Torpedo Inventory. United States Naval Institute Proceedings.
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