W55 (nuclear warhead)

The W55 was a tactical nuclear weapon that was in service with the US Navy from 1964 to 1990,^[4] and was carried by the UUM-44 SUBROC submarine-launched missile as a nuclear depth bomb.^[5]

W55 nuclear warhead
Type	Nuclear weapon
Place of origin	United States
Production history
Designer	Lawrence Livermore National Laboratory
Produced	January 1964 to March 1968 and May 1974 to April 1974
No. built	285 warheads produced in two production runs
Specifications
Mass	465 lb (211 kg)
Length	39.4 inches (100 cm)
Diameter	13 in (33 cm)
Blast yield	Disputed, either 1 to 5 kilotonnes of TNT (4.2 to 20.9 TJ) or 25 kilotonnes of TNT (100 TJ)
References	[1][2][3]

The last W55 warhead was dismantled in December 1996.^[6]