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And any helicopter shot down will inevitably bring others to rescue the crew, thus giving the guerrilla more targets. Even if the guerrilla has to break off the air defense battle because of the enemy's superior firepower, this is the best opportunity for the Insurgent to fight the enemy on even terms. But fighting a battle at the LZ may not be in the best interests of the guerrilla. Certainly, if the heliborne troops are relatively few in number and landing in a Single area close to a point where the guerrillas can mass their forces, the enemy should be dealt a crippling blow within sight of their wrecked helicopters.

If the weapon is close enough when it explodes, the shrapnel will damage important hydraulic Systems and might even penetrate the cockpit. The main difficulty is in designing and making a proximity fuze. During World War II, it took the United States and England tremendous efforts to build the first one, while Germany never did succeed in making such a device. The next device is a heat-seeking warhead. As described in Chapter 5, the infrared seeker homes in on the heat of an aircraft engine. This is an extremely sophisticated device because it actually consists of two separate mechanisms: a homing device that keeps the warhead aimed at the heat source and a servo mechanism attached to the rocket's fins for course corrections.

The effective use of missiles requires skill just as the use of automatic weapons requires skill. Infrared-guided missiles correct their course as they fly to their target. As long as the gunner provides the lead angle and elevation Standard to his particular weapon, the missile will do all the work. The gunner's main concern is when to launch. First, the gunner should hold fire until the target is within range. He should always know the range of his weapon, both its minimum and maximum range, and be skilled at gauging distance.

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