- NATO has defined a five-level international scale to characterize the attenuation of munition responses to stimuli.
|
Nature of reaction to a stimulus
|
NATO scale
|
 |
|
| Combustion without lethal projection |
Type V
|
Increasing
|
|
| Fast combustion |
Type IV
|
attenuation
|
Increasing
|
| Explosion |
Type III
|
|
Violence
|
| Partial detonation |
Type II
|
|
of the
|
| Detonation |
TYPE I
|
|
reaction
|
|
TYPE OF STIMULUS
|
ULTIMATE/IDEAL ATTENUATION OBJECTIVES
|
TESTING METHOD TO BE USED
|
| Fire |
V
|
Stanag 4240
|
| Slow cookof |
V
|
Stanag 4382
|
| Bullet impact |
V
|
Stanag 4241
|
| Sympathetic detonation |
III
|
Stanag 4396
|
| Light fragment impact |
V
|
National testing
|
| Heavy fragment impact |
V
|
"
|
| Shaped charge jet |
III
|
"
|
| Spall |
V
|
"
|
Attenuation aims specified by Stanag 4439
IMness levels
Maximal accepted response levels
|
STIMULI
|
FRANCE
|
NATO
|
UK
|
USA
|
||
|
French DOD MURAT policy
DGA/IPE 260 memorandum (july 93) |
STANAG
4439 (2) |
OBP
42657 |
MIL-STD
2105 B |
|||
|
*
|
**
|
***
|
||||
| RAPID HEATING |
IV(1)
|
V
|
V
|
V
|
V
|
V
|
| SLOW HEATING |
III
|
V
|
V
|
V
|
V
|
V
|
| BULLET IMPACT |
III
|
III
|
V
|
V
|
V
|
V
|
| SYMPATHETIC REACTION |
III
|
III
|
IV
|
III
|
III
|
II
|
| LIGHT FRAGMENT IMPACT |
I
|
III
|
V
|
V
|
||
| HEAVY FRAGMENT IMPACT |
I
|
III
|
IV
|
V
|
||
| SHAPED CHARGE JET |
I
|
I
|
III
|
III
|
V
|
II
|
| SPALL AFTER SCJ |
V
|
V
|
V
|
|||
| DROP |
NR
|
NR
|
NR
|
NR
|
NR
|
|
| ELECTRIC STIMULI |
NR
|
NR
|
NR
|
|||
(1) without propulsion
(2) STANAG 4439 = ideal goals
date : sept 1st 1999