> Most weapons are INS guided despite the long fly times of cruise missiles etc. And because of a long fly time or imprecise initial reference point (a submari

> Most weapons are INS guided despite the long fly times of cruise missiles etc. And because of a long fly time or imprecise initial reference point (a submarine is floating) some do corrections. One of the coolest one for ICBMs is to use celestial navigation to correct errors. They'd have a window with a camera and would "look" for a few stars.