anchor line fouled on a shipwreck

so, on the charts there is written, in small font, the letters 'Wk'. This is written in the exact place where we dropped anchor for the week. Turns out - that means - wreck, as in shipwreck. So, after 4 days of my boat drifting in the tides, pivoting on anchor, my anchor rode became entangled with a large piece of wreckage. When we tried to pull anchor on Saturday, it soon became clear that we were screwed.

I knew what I had to do, and I knew it was the last thing I wanted to do on a cold Winter morning - but anyway, I put on 6mm of neoprine and un-fouled the line, then we were on our way.