W55

The W55 was an American thermonuclear warhead used as the warhead for the SUBROC antisubmarine rocket system. The W55 was designed in the early-1960s, and produced from 1964 to 1968. The last units were retired from service in 1990. A total of 285 W55 weapons were produced.The W55 had a yield which has been variously described as 1, 5, and 250 kilotons. Some sources suggest that the W55 evolved from the experimental bomb tested in the Hardtack I Olive nuclear test on July 22, 1958, which had a yield estimated at 202 kilotons.The W55 is 35 cm (13.5 inches) in diameter, 1 metre (39.4 inches) long, and weighs 213 kg (470 pounds).
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Bitten or struck by other mammals