All at Sea

I had joined the Navy. The American Navy to be precise as I seemed to be a crew member of the aircraft carrier USS Enterprise. A friend of mine had also joined but the problem was neither of us knew where the Enterprise was berthed.
We had been told to board her on the river Tay in Scotland.We had been issued with a magnetic mine between us, in case we ran into enemy shipping en route. Only problem was it was quite heavy.
Another problem occurred to us in that we didn't know who the enemy might be. Russia was probably not an enemy and we were pretty sure that the Taliban or Al-Qaeda didn't have a navy. So, we would have to play it by ear.
Anyway the main problem was finding the aircraft carrier. Obvious place was the harbour, no trace. We looked inland. Perth and Dundee seemed to have fused into one, an unlikely and unhappy merger.
We searched the areas of Urban Unrest such as Letham, Lochee, Muirton and Menzieshill. No Enterprise, nor any enemy shipping.
Then we saw a huge white ship churning its way up into Oakbank, quite a well heeled area. Trouble can errupt anywhere it seems.
We set off to board it, remembering not to attach the mine.