For the first time, the AVIC video details claims for the accuracy of each of the CM-400’s three major guidance systems, starting with a 50m (164ft) circular error probable (CEP) for an inertial navigation system coupled with satellite positioning. A weapon's CEP is defined as the 50% probability that it will hit within a given radius of the target’s position.
The accuracy of the CM-400 improves by an order of magnitude - to a CEP of 5m - when an onboard infrared (IR)/TV seeker activates to provide terminal guidance. The list also claims that the CEP of the weapon actually worsens to 5-10m when an IR/TV seeker is supplemented by a passive radar during the terminal phase. It is not clear why the passive radar – identified as occupying the L, S and X bands of the electromagnetic spectrum – would not improve the CM-400’s accuracy.
AVIC lists the 0.4m-diameter missile as having a range of between 54-130nm (100-240km), while carrying either a 150kg blast warhead or 200kg penetration warhead.
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