START I

Current as of: May 21, 1996
Created August 1, 1991

START: DATA BASE
The Memorandum of Understanding (MOU) on Data contained in the START Treaty establishes a benchmark data base and categories of Treaty Limited Items (TLI) for the Treaty. This facilitates verification of compliance with Treaty obligations. The data contained in the MOU are accurate as of September 1, 1990. An update to the data will be exchanged 30 days after the Treaty enters into force, and baseline inspections will be conducted to help verify the data. The chart below contains those US and Soviet strategic nuclear delivery vehicles (SNDVs) and their warheads, which are subject to the central limits. The second chart illustrates how central limits will affect current forces.

Weapon Type US Forces Deployed SNDVs Accountable Warheads Weapon Type Soviet Forces Deployed SNDVs Accountable Warheads

ICBMs MMII 450 450 SS-11 326 326

MMIII 500 1500 SS-13 40 40

PK 50 500 SS-17 47 188

--- --- --- --- SS-18 308 3080

--- --- --- --- SS-19 300 1800

--- --- --- --- SS-24 (silo) 56 560

--- --- --- --- SS-24 (mobile) 33 330

--- --- --- --- SS-25 (mobile) 288 288

SLBMs Poseidon 192 1920 SS-N-6 192 192

Trident I 384 3072 SS-N-8 280 280

Trident II 96 768 SS-N-17 12 12

--- --- --- --- SS-N-18 224 672*

--- --- --- --- SS-N-20 120 1200

--- --- --- --- SS-N-23 112 448

Total ICBMs & SLBMs 1672 8210 --- 2338 9416

Heavy Bombers B-52(ALCM) 189 1968 Bear (ALCM) 84 672

B-52(Non-ALCM) 290 290 Bear (Non-ALCM) 63 63

B-1 95 95 Blackjack 15 120

B-2 0 0 --- --- ---

Total Heavy Bombers 574 2353 --- 162 855

*Attribution of 3 warheads in accordance with downloading provisions

Effect of START Reductions on Current Forces

START Limits US Totals (% Reduction Required) Soviet Totals (% Reduction Required)

SNDVs 1600 2246 (29%) 2500 (36%)

ICBM & SLBM Warheads 4900 8210 (40%) 9416 (48%)

Total Accountable Warheads 6000 10563 (43%) 10271 (42%)

Heavy ICBM Warheads 1540 0** 3080 (50%)

Mobile ICBM Wareheads 1100 0** 618 (0%)

Throw-weight of ICBMs & SLBMs 3600 MT 2361.3 MT (0%) 6626.3 MT (46%)

**US has not deployed these systems.

Weapon Type		US Forces Deployed SNDVs	Accountable Warheads	Weapon Type	Soviet Forces Deployed SNDVs	Accountable Warheads
ICBMs	MMII	450	450	SS-11	326	326
	MMIII	500	1500	SS-13	40	40
	PK	50	500	SS-17	47	188
---	---	---	---	SS-18	308	3080
---	---	---	---	SS-19	300	1800
---	---	---	---	SS-24 (silo)	56	560
---	---	---	---	SS-24 (mobile)	33	330
---	---	---	---	SS-25 (mobile)	288	288
SLBMs	Poseidon	192	1920	SS-N-6	192	192
	Trident I	384	3072	SS-N-8	280	280
	Trident II	96	768	SS-N-17	12	12
---	---	---	---	SS-N-18	224	672*
---	---	---	---	SS-N-20	120	1200
---	---	---	---	SS-N-23	112	448
Total ICBMs & SLBMs		1672	8210	---	2338	9416
Heavy Bombers	B-52(ALCM)	189	1968	Bear (ALCM)	84	672
	B-52(Non-ALCM)	290	290	Bear (Non-ALCM)	63	63
	B-1	95	95	Blackjack	15	120
	B-2	0	0	---	---	---
Total Heavy Bombers		574	2353	---	162	855
*Attribution of 3 warheads in accordance with downloading provisions

Effect of START Reductions on Current Forces
START Limits		US Totals (% Reduction Required)	Soviet Totals (% Reduction Required)
SNDVs	1600	2246 (29%)	2500 (36%)
ICBM & SLBM Warheads	4900	8210 (40%)	9416 (48%)
Total Accountable Warheads	6000	10563 (43%)	10271 (42%)
Heavy ICBM Warheads	1540	0**	3080 (50%)
Mobile ICBM Wareheads	1100	0**	618 (0%)
Throw-weight of ICBMs & SLBMs	3600 MT	2361.3 MT (0%)	6626.3 MT (46%)
**US has not deployed these systems.