This appendix discusses measures for security of the ADA sensor section position. One of the primary tasks for the ADA sensor section chief is to plan the defense of the section or individual position. Such things as setting up reference points, assigning sectors of fire, and placing claymore mines, are a part of the section chief's responsibility.
Sensor section chiefs address security, target detection, engagement of targets, fire support, illumination, and fighting positions in their defensive scheme. Security of the section night defensive position (NDP) consists of both active and passive measures.
Physical security is all of the measures which keeps the section from being surprised. This includes security in all directions. Rock-filled cans suspended on barrier wire or across suspected avenues of approach can provide intrusion warning. The section chief should control the section fires with tracer fire. All section members should engage the targets marked by the section chief. Each position should have an NVD. These allow the chief to be proactive instead of reactive. This ensures that every man adjusts to the changing light and noise conditions, and is dressed, equipped, and ready for action.
Passive measures include camouflage of positions, control of movement, light and noise discipline, and limiting radio traffic. Soldiers must also pick up their litter.
Target detection during the day is easier than at night since terrain feature references can be seen. At night, two reference methods are range cards and a grid matrix.
A range card is a rough sketch of the terrain around a weapon. It is prepared for each weapon system and sensor. The card shows sectors of fire, final protective line (FPL), or principal direction of fire (PDF) of the weapons, targets, and ranges to them. Each soldier prepares at least two copies of a range card for his position. The soldier keeps one copy at the position and gives one copy to the section chief. The section chief makes a section sector sketch, using the individual position's range cards.
A grid is created using luminous tape or chemical lights with minimal light exposure. The best grid is a three-spot by two-spot grid per sector (see the Grid Matrix for Target Reference illustration on page E-2). The spots serve two purposes: reference points for targets, and a method to adjust the height of direct fire (the lower the rounds, the more effective they are). Once the sector is established, have each section member memorize the terrain. The luminous markers help identify terrain. When sounds are heard, a target location can be referenced. Oftentimes, targets cannot be seen, but the direction can be determined and fire placed on it.
Leaders establish how targets should be engaged; for example, the first targets engaged are those that threaten the position. Leaders verbally, and with tracer fire, establish and reestablish target priorities during contact. Enemy targets are attacked without revealing friendly positions, if possible. Command detonating, well-placed claymore mines, will serve to surprise, kill, and silhouette the attackers. Hand grenades also stun or surprise the enemy or injure and kill him. The M203 grenade launcher illumination round is good for short term illumination of small areas to ward off probes. This is preferable to illumination that lights the entire sector--friendly and enemy.
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