UGM-133 Trident II

Product Type:

Submarine-Launched Ballistic Missile (SLBM)

Using Service (US):


Program Status:

In Production

Prime Contractor:

Lockheed Martin Corporation

The Trident II D5 Ballistic Missile

About the Trident II:

The Lockheed Martin UGM-133 Trident II (D5) is a submarine-launched ballistic missile. Trident II missiles are deployed in 14 nuclear-powered SSBN 726 Ohio-class submarines (each carrying 24 missiles) as well as in British Vanguard-class submarines. The missile was first deployed in March 1990 and deliveries to the U.S. Navy were completed in 2007.

The Trident II provides greater range, payload capability, and accuracy than the older Trident I (C4) missile. All three stages of the Trident II are made of lighter, stronger, stiffer graphite epoxy, whose integrated structure means considerable weight saving. The missile's range is increased by the aerospike, a telescoping outward extension that reduces frontal drag by about 50 percent.

Trident II is launched by the pressure of expanding gas within the launch tube. When the missile attains sufficient distance from the submarine, the first stage motor ignites, the aerospike extends and the boost stage begins. Within about two minutes, after the third stage motor kicks in, the missile is traveling in excess of 20,000 feet (6,096 meters) per second.

According to Lockheed Martin, from 1989 through 2014, the U.S. Navy has conducted 150 successful and consecutive test launches of the Trident II D5 missile, a record unmatched by any other large ballistic missile.


The mission of the Trident II (D5) ballistic missile is to deter nuclear war by means of assured retaliation in response to a major attack on the United States or its allies, and to enhance nuclear stability by providing no incentive for enemy first strike. The Trident II (D5) missile has the ability to precisely attack time-critical, high value, fixed targets. The importance of this program as a key component to the sea-based leg of the nuclear triad was confirmed by the President and Congress in the New START Treaty ratification.

FY 2014 DoD Program:

FY 2014 provides procurement funds in the amount of $1,140.9 million for the development of advanced components to improve the reliability, safety and security of arming, fuzing and firing systems, and the procurement and production costs for flight test instrumentation, 12 solid rocket motors, the Post Boost Control System, the Life Extension Program (LEP) and spares. The LEP consists of the procurement of 24 missile electronic and guidance Supportability Mods/Strategic Programs Alteration (SPALT) kits. FY 14 also provides $98.1 million in RDT&E funds.

FY 2015 DoD Program:

FY 2015 provides procurement funds in the amount of $1,190.5 million, including $501.2 million for program and production support costs (including but not limitied to costs associated with flight test instrumentation, additional reentry system hardware and D5 Solid Rocket Motors (SRM) and Post Boost Control System (PBCS)); $657.3 million for the D5LE program; and $32.0 million for New Strategic Arms Reduction Treaty (New START) Implementation. FY 14 also provides $96.9 million in RDT&E funds.

For more information, click to view the FY 2015 Trident II DoD Budget.

Source: U.S. Department of Defense (DoD) and Lockheed Martin Corp.

Specifications DoD Spending FY2015 Budget

Last Update: August 18, 2014.

By Joakim Kasper Oestergaard /// (

External Resources:

Lockheed Martin: Trident II Ballistic Missile

YouTube: Trident II Ballistic Missile | YouTube Videos

Fact Sheet: Not Available

Trident II U.S. Defense Budget Charts:

DoD Spending on the Trident II Ballistic Missile in FY 2011, FY 2012, FY 2013, FY 2014 and FY 2015
DoD Modifications of Trident II Ballistic Missiles in FY 2011, FY 2012, FY 2013, FY 2014 and FY 2015
Defense Budget Data

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DoD Spending, Procurement and RDT&E: FY 2011/12/13 + Budget for FYs 2014 + 2015

DoD Defense Spending, Procurement, Modifications, Spares, and RDT&E for the Trident II

Download Official U.S. Department of Defense (DoD) Budget Data:

Modification of Trident II Missiles (NAVY)

Missile Specifications: UGM-133 Trident II

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Primary Function: Strategic Nuclear Deterrence
Prime Contractor: Lockheed Martin Corporation
Propulsion: Three-stage solid-propellant rocket
Length: 44 ft (13.41 m)
Diameter: 83 in (2.11 m)
Weight: 130,000 lbs (58,500 kg)
Speed: 13,422+ mph (21,000+ km/h)
Range: 4,000+ nm/4,600+ miles (7,360+ km)
Guidance System: Stellar and Inertial Navigation System (INS)
Warhead: Nuclear MIRV (Multiple Independently Targetable Re-entry Vehicles)
Platform: SSBN-726 Ohio Class Submarine
Price/Unit Cost: $30.9 million
Initial Operational Capability (IOC): March 1990

Defense Program

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