>The MGS is an inertial guidance system which directs the flight of the missile. The guidance system operates continuously while the missile is in alert status, thus enabling the missile to be launched in less than one minute.

I wonder how often the missile is in alert status? Presumably regular testing?

For those just skimming the guidance system info (for Minuteman III) starts on page 49. Looks like they miniaturized it some and that giant moon lander backplane seems to be substantially reduced?

Amazing pics, thanks for sharing!