Final answer:
The question relates to a safety feature of the precision guidance kit (PGK) used in the military, which does not arm unless the 'will hit' grid is within a certain distance of the 'should hit' grid, but the distance in meters is missing from the question.
Step-by-step explanation:
The question pertains to the precision guidance kit (PGK), which is a device used in military technology to improve the accuracy of projectiles like artillery shells
. The PGK includes a safety mechanism that ensures it only arms and detonates if the 'will hit' grid is within a specific distance of the 'should hit' grid. Unfortunately, the question is missing a critical piece of information—the actual distance in meters—required to provide a complete answer. Without this numeric value, we cannot specify when the PGK will fail safe and not arm.