MIRV Defense System

A multiple independently targetable reentry vehicle (MIRV) is an exoatmospheric ballistic missile payload containing several warheads, each capable of being aimed to hit a different target. The introduction of MIRV led to a major change in the strategic balance. Previously, with one warhead per missile, it was conceivable that one could build a defense that used missiles to attack individual warheads. Any increase in missile fleet by the enemy could be countered by a similar increase in interceptors. With MIRV, a single new enemy missile meant that multiple interceptors would have to be built, meaning that it was much less expensive to increase the attack than the defense.

I would like to propose an economical defense system against MIRV attacks. It’s based on the fact that MIRVS are launched from a distant location than the defender missiles that need to travel less to defend. The idea is to utilize VTOL (Vertical Take-Off & Landing) or STOVL (Short Take-Off & Vertical Landing) cargo planes that can launch short range anti-ballistic missile. Ideally these planes would be unmanned and stay aloft for a longer period of time. Their fast maneuverability compared to land-based defense systems would allow them to locate themselves close to the direction of the attack. Therefore, the defensive missiles do not need to travel long distances. Additionally, anti-ballistic missiles can also have multiple defensive warheads to counteract the multiple heads of an offensive missile.

One final note, the anti-ballistic missiles can be powered by liquid propellant. This would enhance their range and even final speed. The unmanned cargo plane would also be powered by the same fuel as the rocket. Therefore, the missiles can be filled on demand from the large tanks of the plane depending on the range requirement like the naval powder bags.