Slipping upriver on a grey morning ...

I didn't notice them at first - not until the leading naval ship moved so that I could see the paler water between it and the far shore. They're not supposed to be particularly visible, I imagine, and this morning they weren't. Two ships (I'm not good with naval terminology) followed by a submarine (to the right) - not a Trident-bearing one, but one of the hunter-killer variety. I could see a fourth vessel just emerging from the downstream haze if I hung precariously from my window ...

It was then that I decided I'd better dress.