We saw this earlier but Navy recognition has another report on the Leonardo Black Scorpio, a truly very small torpedo, 127mm (5″) in diameter and 1.1 meters (43.3″) in length. The report provides a bit more insight into how it is expected to be used.
Much as I see the need for the Coast Guard to have a light weight torpedo, this may be too small to have anything more than very limited utility. A 21″ (533mm) heavy weight torpedo is 80-100 times heavier. A 12.75″ (324mm) light weight torpedo is 11 to 12 times larger. Even Grumman’s “Common Very Light Weight Torpedo” is five times as large.
But I am still curious. Range? Speed? Sensor range? Usable against surface ships? Midget submarines? Moored mines?