The Delilah’s operation is similar to what is described above; it, too, possesses a “Man in the Loop” mechanism, where the navigator controls the final direction of the missile. However, in the case of the Delilah there’s a key difference: as the missile makes the final approach, if the target has moved or if there’s a need to cancel the attack (for example, if civilians are spotted near the target), all the navigator needs to do is press a button in the cockpit which instructs the missile to abort its approach and return to linger. Thus, situations in which a missile is wasted on a target that has disappeared, or in which civilians are accidentally killed can be prevented. In the same way the use of a missile on a target that has already been destroyed can be prevented, saving valuable ammunition.
This is not the only value in the Delilah missile’s ability to linger. One can imagine a situation in which the target’s precise location is not known with any certainty, for example if it is a portable anti-aircraft launcher or land-land missile launcher. In this case the Delilah can be launched in the general direction of the target, based on intelligence reports. The missile would fly in the direction of the target, all the while surveying the territory with its homing equipment. The image appears in the cockpit, the Delilah serving effectively as a homing UAV. The Delilah patrols above the territory searching for its target. The missile’s long range can be exchanged for a prolonged stay in the air above the target. When the navigator identifies the target, or what is thought to be the target, he instructs the missile to fly towards it. If he has identified it correctly then the missile is directed to attack it. If he has not found the target then the missile is instructed to abort its approach and return to searching.
The Delilah missile’s ability to both loiter and carry out repeated passes makes it the ideal weapon for attacking mobile sites like rocket launches. Everyone recalls the difficulty the US Air Force faced during the 1992 Gulf War when it attempted to locate and destroy the Iraqi “Al-Hussein” rocket launcher that was used to fire at Israel and Saudi Arabia. The Americans knew roughly where the rockets were being launched from but had difficulty locating the launchers themselves. As a result fighter planes were sent for long patrols over western Iraq every night. On many occasions the Americans identified the point where the missile was launched from, but by the time a counter-strike had been arranged the missile launcher had left the scene. It’s in these sorts of operational profile that the Delilah performs best, perhaps better than any other weapons system. In these cases the Delilah can be launched towards the area intelligence expects the missiles to be launched from. The Delilah will fly above the area and search for missile launchers. When a launcher is identified, it will be immediately struck by the missile. If it’s discovered that the target has not been identified correctly, for example if it’s a dummy launcher or another vehicle that looks like a launcher (such as a petrol tanker), the missile receives the instructions to end its approach and continue to search for the real target.
