A weapon whose direct hit rate exceeds that of the so-called precision guided weapon.

Only guided weapons with a direct hit rate of over 50% can be called precision guided weapons.

The high probability of direct hit is the fundamental origin of the name of precision guided weapons, and it is also the most basic feature of precision guided weapons. The hit probability of some representative precision-guided weapons can reach more than 80%, and the circular probability error of laser-guided bombs and TV-guided bombs is about 2 meters.

For example, during the Gulf War, the US Air Force fired two Slam air-to-surface missiles at a distance of 100 km at a hydropower station in Iraq. As a result, two missiles broke into the power plant from the same hole one after another, completely destroying the target.

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After World War II, precision guided bombs have been developing continuously, and their guidance methods include radar guidance, television optical guidance, thermal vision guidance, laser guidance, inertial guidance and GPS guidance.

1965, the United States invented the "Gemstone Road" laser-guided bomb, which was widely used in the Vietnam War.

The principle of laser guidance is that the target is illuminated with a laser pen on the ground or on an airplane, and the laser is reflected and received by the receiver on the missile. The head of the bomb is equipped with a photosensitive indicator board, and the laser is focused on the indicator board. By comparing the relative position between the light spot and the target, the deviation of the bomb can be calculated, so as to adjust the full-motion rudder surface and guide the bomb to hit the target.

Laser guidance is easily affected by clouds, fog and bad weather, so it is used in short distance. In the 1990s, the United States developed a composite guided bomb based on Global Positioning System (GPS) and Inertial Navigation (INS)-"Jedam" JDAM joint attack ammunition, which can be used in any bad weather and is one of the representatives of the 4th generation precision guided bomb.