rabbit hole

…Entering Through a Breached Hole Figure A-28. Tossing a Grenade Up a Stairway Military Operations on Urbanized Terrain A - 25

…Loopholes should be made by punching or drilling holes in walls and should be placed where they are concealed. Blasting loopholes can result in a large hole that can easily be seen by the enemy. (b…

…Tanks can be used to breach a hole in heavy-clad framed buildings. Their floor plans are normally oriented around a stairway or elevator. this must be secured during clearing (Figure C-9). The interior walls…

…No precise data exist as to the number of rounds required to produce loopholes or breach holes with the MK19. However, the rounds’ explosive effects are dramatic and should exceed the performance of the .50-caliber…

…When firing within a building, ensure that the enclosure is at least 10 feet by 15 feet, is clear of debris and loose objects, and has windows, doors, or holes in the walls to allow the…

…The natural firing port provided by windows can be improved by barricading the window and leaving a small hole for the firer’s use (Figure A-56). The barricading may be accomplished by using materials torn…

…Type Penetration Rounds Required 8-inch reinforced concrete Initial Loophole 35 250 14-inch triple brick Initial Loophole 90 160 12-inch cinder block with single-brick veneer Loophole Breach hole 60 250 9-inch double…

…Small holes (called mouseholes) should be made through interior walls to permit movement between rooms. Once the defender has withdrawn to another level, such holes should be clearly marked for both day and night identification. All…

…The APFSDS round can penetrate deeply into a structure but does not create as large a hole or displace as much spall behind the target. In contrast to lighter HEAT rounds, tank HEAT rounds are large…

…This may be a maintenance hole. With the maintenance hole cover removed, the squad waits 15 minutes before entry to allow any gases that may be present to dissipate. The point person then descends into the…

…Reinforced concrete walls, which are 12 to 20 inches thick, present problems for the 25-mm gun when trying to create breach holes. It is relatively easy to penetrate, fracture, and clear away the concrete, but…

…Table B-12 lists the number of HEI-T rounds needed to create different-sized holes. Target Loophole Breach Hole 3-inch brick wall at 0-degree obliquity 10 rounds 20 rounds 3-inch brick wall…

…Excessive ammunition is required to destroy the net because most rounds only pass through a previously eroded hole. One or two minutes of work with an entrenching tool, crowbar, or ax can remove this web and…

…This prevents injury to the shooter from falling debris or explosions above his/her position. (4) The position should be camouflaged by knocking other holes in the wall. This makes it difficult for the enemy to…

Target Loophole Breach Hole 3-inch brick wall at 0-degree obliquity 22 rounds 75 rounds 3-inch brick wall at 45-degree obliquity 22 rounds 351 rounds 5-inch brick wall at 0-degree obliquity…

…The SMAW produces a hole in brick walls that is often large enough to be a breach hole. (3) Wooden structural walls offer little resistance to light recoilless weapons. Even heavy timbered walls are penetrated and…

…And so what we judge effectiveness by is not just whether there is a hole in the room of a building, but whether or not the function that the element did before ceases to be effective…

…Freshly dug holes along the roadway (possible future IED report). New dirt or gravel piles. Obstacles in roadway used to channel the convoy. Personnel on overpasses. Signal with flares or city lights (turned off or on…