If a mortar position is chosen that has a minimum safe elevation of mils, that position is safe from mm and mm howitzer rounds fired directly over the hill mass or ledge. Some fuzes have a safety wire inserted through the time mechanism for safety in handling and shipping. Another layer of sandbags or earth is put on followed by a layer of stone. This position protected a heavy mortar squad and allowed it to continue to fight, even during intense enemy countermortar fire. Platoons can increase accuracy and reduce adjusting rounds in several ways. This is accomplished by Urban masking impacts the use of illumination.
These are the Microdet electric detonator, the explosive lead, the explosive booster, and the delay primer assembly functioning as follows: It can be constructed totally below, partly above, or completely above ground, depending on the time and material available and the composition of the ground at the intended position. Ammunition boxes form the floor on which the ammunition is stacked. The Tacter D is equipped with a secondary battery for uninterrupted operation during a main battery hot-swap and an optional military or commercial embedded GPS. Any of several versions depicted in FM is satisfactory. Half that and you get the effective blast radius.
Figures through show various bunker designs and standards. The doctrine used by many potential adversaries calls for the massive use of indirect fire before an attack. I have seen a photo of a Tiger on its side in Normandy Improved battlefield surveillance technology will become extremely important for targeting indirect fire. You will notice that the 60mm is smaller than the 81mm which is smaller than the mm.
Yet with a ram little more than a steel tube on a plow type extension they will go through most garden walls just like an Abrams. Tile roofs give immunity to 60mm and light 81mm. This can enter either the circular pit or one of the personnel shelters. Unlike an Abrams, you can actually walk beside them when they fire their main weapon. Heavy forces use carrier-mounted mortars to allow the mortar platoon to move cross-country at speeds compatible with the battalion task force.