Comment by Schiendelman

On your first point - it is much more difficult than you think to "reasonably track" a vessel. There's no hardware just sitting there to watch what direction the carrier moves next. Satellites have to orbit - that's why you only get new photos of ground targets once or twice during a news cycle. Carrier movement patterns in wartime are designed to avoid reacquisition.

Finding the things is not trivial. Finding them twice is even less trivial.