h. Stump and Post obstacles are tree stumps at least 15 inches in
diameter and 2 to 4 feet high combined with tactical wire, mines and booby
traps (Figure 2-33).
Figure 2-26. Stump and Post Obstacles.
i. Antihelicopter/Antiair obstacles are placed on suitable landing
fields
and parachute drop zones to demolish aircraft in landing and to
impede
movement and landing of paratroopers.
Effective obstacles include
filled
oil drums, minefields, felled trees, and persistent toxic chemical
agents
used alone or Integrated with other obstacles.
j. Concrete obstacles are erected in continuous lines forming an antitank
or antisea landing obstacle, i.e., roadblock, crosscountry block (Figure 2-
27)
k. Steel obstacles may be scattered near a beach or riverbank as
antilanding devices, in small numbers as roadblocks, or in continuous lines
as antitank or antisea landing obstacles (Figure 2-27).
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