UGM-73 Poseidon

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The UGM-73 Poseidon is a United States submarine-based intermediate-range two-stage missile with a nuclear warhead. It was the second of the United States submarine-based nuclear weapons delivery systems, replacing the UGM-27 Polaris. It had the same range as the Polaris, but was more accurate. It was replaced by the Trident I in 1979.

Development

The Poseidon was developed not so much as a retaliatory weapon against the Soviet Union but as a weapon to target SAM sites, radar sites, and enemy bases. This would allow bombers and ICBMs a clear pathway through. It never completely replaced the Polaris; the Trident did that.

Specifications

UGM-73A Poseidon C3

Type SLBM
Contractor Lockheed Martin
Power plant Two-stage solid-propellant rocket
Length 34 feet, 2 inches
Diameter 74 inches
Weight 64,400 pounds
Range 2500 miles
Warhead 10 or 14 W69 MIRVs with 50 kt yield each
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