[LoBlo]

You know what I've always been curious about... whether the US Ohio SSBNs actually wander around in a organized patrol, or do they find a spot in the ocean and just sit and hover...

I've always thought that sitting and hovering were probably as good a strategy for not being found, but I guess the real answer really comes down to the orginal question you ask. Maybe they actually wander around the ocean in "systematic randomness" to decrease detection probabilities... there are probably only a handful of people in the world that actually know and ever will know.