FM 3-01.85: Patriot Battalion and Battery Operations - BITS

FM 3-01.85
5-26
THAAD
5-86. Principle 2—Defense designers should build defenses around Levels 2
and Level 4 criteria. Level 2 refers to the level of engagement effectiveness
required against a specified target set that can be achieved from a single-tier
operating alone. Level 2 is the appropriate level of defense for military assets
that have some level of protection to similar less vulnerable assets.
Figure 5-11 demonstrates Principle 2, Level 2 medium level of engagement
effectiveness.
PATRIOT
Level 2
Patriot and
THAAD
PATRIOT
Level 2
THAAD
Only
Level 2
Patriot or
THAAD
PATRIOT
Figure 5-11. Principle 2, Level 2, Medium Engagement Effectiveness
Level 2
Patriot
Only
5-87. Normally Level 4 refers to two-tiers operating in an integrated defense
but may refer to one-tier operating independently. Two-tiers operating in an
integrated defense is applicable only to targets in the common target set
(upper and lower-tier). Figure 5-12 demonstrates Principle 2, Level 4 very
high level of engagement effectiveness for two-tiers. Figure 5-13
demonstrates Principle 2, Level 4 for one-tier. Level 4 provides very high
level of engagement effectiveness for soft targets and high priority assets
such as population centers, ports and airfields.