July 29, 1992


The START Treaty sets forth limits for Intercontinental Ballistic Missiles (ICBMs) and their associated launchers and warheads; Submarine Launched Ballistic Missiles (SLBMs) launchers and warheads; and heavy bombers and their armaments including Long-Range Nuclear Air-Launched Cruise Missiles (LRNAs). The existing types of these items for the US and Soviet Union are described below.

Intercontinental Ballistic Missiles (ICBMs)
WeaponLauncherWarheads Per MissileWeaponLaunchersWarheads Per Missile
Minuteman II (MMII)Silo1SS-11 Silo 1
Minuteman III (MMlll)Silo 3 SS-13 Silo 1
Peacekeeper (PK) Silo(1)10 SS-17 Silo 4
--- --- --- SS-18 (heavy) Silo 10
--- --- --- SS-19 Silo 6
--- --- --- SS-24 Mobile/Silo(1)10
--- --- --- SS-25 Mobile 1
(1) Silo-based SS-24s and PKs are considered mobile ICBMs for most Treaty purposes.

Submarine Launched Ballistic Missiles (SLBMs)
Weapon Warheads Per Missile Weapon Warheads Per Missile
Poseidon 10 SS-N-6 1
Trident I 8 SS-N-8 1
Trident II 8 SS-N-18 3(2)
--- --- SS-N-20 10
--- --- SS-N-23 4
(2) Subject to downloading provisions

Heavy Bomber Aircraft
BomberArmament Bomber Armament
B-52GLRNAs & other nuclear armament Bear HLRNAs
B-52H LRNAs Blackjack LRNAs
B-1B Other nuclear armament Bear A Other nuclear armament
B-2 Other nuclear armament Bear B Other nuclear armament
--- --- Bear G Other nuclear armament

Long-Range Nuclear Air-Launched Cruise Missiles (LRNAs)
Weapon Weapon
AGM-86B AS-15 Mod A
AGM-129 AS-15 Mod B