UGM-133A TRIDENT II (D5)
BRIEFING: The UGM-133A Trident II (D5) is a three-stage,
solid-propellant, inertially guided fleet ballistic missile carried
by the Ohio-class nuclear-powered ballistic-missile submarines
(SSBNs). Trident II is more sophisticated than the UGM-96A
Trident I ( C4), with a significantly greater payload capability.
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
steam 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 ignites, the missile is
traveling at nearly 20,000 feet per second.
The long-range Trident II D5, initially deployed in 1990, has
vastly increased the areas in which SSBNs can operate and still
have their missiles reach their targets, offsetting improvements
in the anti-submarine warfare capability of potential adversaries. Trident II D5s are subject to the limitations of the 1993
Strategic Arms Reduction Treaty II.
The Trident I C4 was deployed in the first eight boats of the Ohio
class. The Trident II D5 was deployed in the remaining 10 boats of
the class. The last Trident I C4 patrol was completed in September
2005 and the missile was withdrawn from service. Of the eight
Ohio-class boats that deployed the Trident I C4, the first four have
been converted to guided-missile (SSGN) configurations. The
remaining four have been backfitted to carry Trident II D5 missiles.
The Trident has been selected to arm the next-generation
ballistic-missile submarine, the Ohio-class Replacement.
LENGTH:...................... 44 feet
DIAMETER: .................. 83 inches
WEIGH T: ....................... 130,000 pounds
RANGE:........................ 4,000+ nautical miles
POWER PLANT:...........3-stage solid-fuel rocket
WARHEADS: ................thermonuclear multiple independently
targetable re-entry vehicles
CONTRACTOR: ...........Lockheed Martin Space Systems Co.
R/UGM- 109 TOMAHAWK
BRIEFING: The Tomahawk Land-Attack Missile (TLAM) is a
long-range, all-weather subsonic cruise missile that can be fired
from surface or submarine launch platforms. The Tomahawk
carries a nuclear or conventional payload. The conventional,
land-attack, unitary variant carries a 1,000-pound-class warhead (TLAM-C), while the submunition dispenser variant carries 166 combined-effects bomblets (TLAM-Ds). The Block III
version incorporates engine improvements, an insensitive
extended-range warhead, time-of-arrival control and navigation
capability using an improved Digital Scene Matching Area
Correlator and the Global Positioning System (GPS) — which
can significantly reduce mission-planning time and increase
navigation and terminal accuracy.
Tomahawk Block IV (TLAM-E) — the “Tactical Tomahawk”
— has capability enhancements that include increased flexibility using two-way satellite communications to reprogram the
missile or send it a new mission in flight and receive missile
health and status messages during flight. Other improvements
include increased responsiveness with faster launch timelines,
mission-planning capability aboard the launch platform, loiter
capability in the area of emerging targets, the ability to provide
battle-damage indication in the target area, the capability to provide a single-frame image of the target or other area of interest
along the missile flight path, and affordability.
Full-rate production of the Tactical Tomahawk began in July
2004. In October 2010, the Navy completed the first live firing
of a new warhead, the Joint Multi-Effects Warhead System,
which will give the Tactical Tomahawk enhanced penetration
capabilities in addition to blast fragmentation. Communication
upgrades to the Tactical Tomahawk were tested in 2014 to
improve the missile’s dynamic targeting capabilities.
TOMAHAWK LAND-ATTACK MISSILE BEING FIRED BY USS
UGM-133A TRIDENT II (D5)