Y BALLISTIC MISSILES
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in September 2005 and the missile withdrawn from service.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 boats have been backfitted to
carry Trident II D5 missiles.
The Trident has been selected to arm the next-generation
Columbia-class ballistic-missile submarine. The Trident inventory is going through a life extension, with the upgraded missiles
DIAMETER:.............. 83 inches
WEIGHT: . . . . . . . . . . . . . . . . 130,000 pounds
RANGE: . . . . . . . . . . . . . . . . . ; 4,000+;nautical;miles
POWER PLANT: . . . . . . . . . . ; 3-stage;solid-fuel;rocket
WARHEADS:. . . . . . . . . . . . . ; thermonuclear;multiple;independently;targetable;
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 conventional payload. The 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 over Block II, an insensitive extended-range warhead and time-of-arrival control. The Block III has
a navigation capability that utilizes an improved Digital Scene
Matching Area Correlator and the Global Positioning System
(GPS) — which can significantly reduce mission-planning
time, improve navigation and increase terminal accuracy.
Tomahawk Block IV (TLAM-E) — the “Tactical
Tomahawk” — has capability enhancements that utilize
two-way satellite communications to reprogram the missile,
send the missile a new mission in flight and receive missile
health and status messages during flight. Other improvements
include a mission-planning capability aboard the launch platform, a loiter capability in the area of emerging targets and
the ability to provide battle-damage indication in the target
area. The improvements to the Block IV have made it more
affordable than past models and increased responsiveness
with faster launch timelines.
Full-rate production of the Tactical Tomahawk began in
July 2004. The Tomahawk was used operationally for the first
time during Operation Desert Storm. Since January 1991, more
than 2,000 Tomahawks have been fired in combat operations,
including in 2011 during Operation Odyssey Dawn in Libya and
in 2014 during Operation Inherent Resolve in Syria.
In January 2015, the Navy conducted a successful test flight
that demonstrated the ability of a network-enabled Tactical
Tomahawk to hit a moving target.
TRIDENT II (D5) MISSILE
TOMAHAWK LAND-AT TACK MISSILE