1. Protective obstacles are usually located beyond hand grenade distance (40 to 100 meters) from individual fighting positions, and may extend out 300 to 500 meters to tie into tactical obstacles and existing restricted terrain.
2. Leaders should plan protective obstacles in depth and try to maximize the effective range of their weapons (do not place an obstacle outside of your individual's or weapon's ability to engage targets attempting to breach an obstacle).
3. When planning protective obstacles, leaders must consider preparation time, the burden on the logistical system, the individual loads, and the risk of loss of surprise.
The attached picture provides an example of how the following three types of wire obstacles are integrated to reinforce a defensive position. The second picture provides general information about several types of protective wire obstacles. Tanglefoot Wire obstacle construction material such as barbed wire and u-shaped pickets can be bought at all local hardware stores.
The following are the three types of wire obstacles:
1. Protective Wire can be a complex obstacle providing all-round protection of a group perimeter. It might also be a simple wire obstacle on the likely dismounted avenue of approach into a squad ambush position.
2. Tactical Wire is positioned to increase the effectiveness of the company's fires. Usually, it is positioned along the friendly side of the machine gun Final Protective Lines (FPLs).
3. Supplementary Wire Obstacles can break up the line of tactical wire. This helps prevent the enemy from locating friendly weapons (particularly the machine guns) by following the tactical wire.