250625-N-N1701-1001

Magna, Utah - Strategic Systems Programs (SSP) disposed of the last first stage Trident I C4 missile rocket motor on June 25, 2025, one of the most significant strategic weapons systems (SWS) in U.S. Navy history.

The Trident I C4 missile was a three-stage, solid fuel, inertially guided, submarine-launched missile. It was named after the weapon wielded by Neptune, the Roman god of the sea. Using advanced technology in propellants, electronics, and other materials, the Trident I missile had a much greater range than all previous missiles, carrying its payload to a range of 4,000 nautical miles. Like the Poseidon missiles it replaced, each Trident I was equipped with multiple independent reentry vehicle (MIRV) capability.

The C4 motor disposed of on June 25 was cast 41 years ago in 1984, marking almost two generations of SSP stewardship.

(U.S. Navy Photo / Released)

250625-N-N1701-1001.JPG Photo By: Shelby Thompson

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End of an Era: SSP Disposes of Last Trident I C4 First Stage Motor

Sep 16, 2025

MAGNA, Utah - Magna, Utah - Strategic Systems Programs (SSP) disposed of the last first stage Trident I C4 missile rocket motor on June 25, 2025, one of the most significant strategic weapons systems (SWS) in U.S. Navy history. The Trident I C4 missile was a three-stage, solid fuel, inertially guided, submarine-launched missile. It was named after the weapon wielded by Neptune, the Roman god of the sea. Using advanced technology in propellants, electronics, and other materials, the Trident I missile had a much greater range than all previous missiles, carrying its payload to a range of 4,000 nautical miles. Like the Poseidon missiles it replaced, each Trident I was equipped with multiple independent reentry vehicle (MIRV) capability. The C4 motor disposed of on June 25 was cast 41 years ago in 1984, marking almost two generations of SSP stewardship. (U.S. Navy Photo / Released)

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