The TOW is guided to its target merely by the gunner keeping the cross-hairs on the target.
Corrective information is sent to the missile by two thin wires that deploy in flight.
Several advanced versions exist including a thermal night sight and an improved warhead variant. Although not as technologically advanced as the TOW, these weapons have proved effective in many wars around the Third World. The PG-7 launches an 85mm grenade about 540 yards and can penetrate light armor. Made in France, the weapon has a range of about 1.2 miles and was used extensively in Iraq's eight year war with Iran. The TOW was plagued by problems when it first arrived in the Gulf, many of them due to the climatic conditions in the desert.