What the......... ?

It was a very early start for me on a Saturday, in that Di, Inge and I were out cutting peat at 9 this morning. There seemed to be massive activity in the Minch today - lots of boats, and even a frigate or two. There was also a submarine last night.

When I got back to the house at lunchtime, I spotted this curious beast in among all the other traffic.

Any clues as to what the 4 columns are about?