Sometimes when I was moving my naval and embarked units around, I have come across whole fleets of parked AI naval units, usually old and obsolete, in some out of the way places (like near the ice cap or off some uninhabited island). They remained there even if the AI owner was at war, when they could still be useful as damage soakers. Is this normal behaviour for the AI? Don't they scrap them or something to reduce maintenance cost? Or am I just seeing things?