[Suicide Junkie]

PDCs are given a +70% to-hit in the components.txt file.

This means that, barring an accuracy-reducing mount, the minimum to-hit is 71%

If the missile is at range 7 or less, the accuracy bonus cancels the range modifier, and you get 99% accuracy even without experience or sensors. Fighters could reduce that with ECM and fleet experience, but ship sensors or experience would overwhelm it, too.