United States of America
Trident I C4 Missile
Updated 03 November 2008

Using advanced technology in propellants, micro-electronics and new weight-saving materials, the Trident I C4 missile incorporated the multiple independently-targeted vehicle capability of its predecessor Poseidon and provided a range of more than 4,000 nautical miles with a full payload.
WMUS_Trident-C4_Launch_pic.jpg

Trident C4 Missile fired at a test range
Note the "aerospike" on the nose of the missile.  This is extended after the missile is fired and makes the missile appear aerodynamically longer, thus increasing its stability and range.
Photograph copyrighted by Lockheed-Martin Missile and Space

WMUS_Trident-C4_collection_pic.jpg

A montage of seven views showing the launching of a Trident I C-4 missile in October 1981 from the submerged submarine USS Francis Scott Key SSBN-657 and the Trident's re-entry bodies as they plunge into the earth's atmosphere and then into the Atlantic Ocean
U.S. Navy Photograph No. DN-SC-82-00005

Picture comparing Poseidon C-3 and Trident I C-4

The Poseidon is on the left and the Trident is on the right
In the foreground is a model of USS Ulysses S. Grant SSBN-631
U.S. Navy Photograph No. DN-SC-82-00006

.
Description
.
Designation Trident C-4 UGM-96A
Ship Class Used On Ohio Class SSBN-726 (24 missiles)
Backfitted to some Benjamin Franklin SSBN-640 (16 missiles)
Date In Service 1979
Weight 70,000 lbs. (31,750 kg)
Dimensions 74 X 408 in (188 X 1,036 cm)
Payload Eight 100 kt Mark 4 MIRV
Range 4,350 nm
Propulsion 2 stage solid fuel rocket
.
Data from
Lockheed-Martin Missile and Space
"The Naval Institute Guide to World Naval Weapon Systems 1991/92" by Norman Friedman
US Navy Fact File
---
China Lake Museum