One the way back from Beaulieu the Speed Log stopped working and I couldn’t clear it by rotating it in it’s housing. A quick swim – the sea temperature is currently around 21C – revealed that it was jammed.
Once removed it became apparent that one of the threaded pins that form a spindle for the rotating paddle had become bent to about 20 degrees from true. I can only think that I sailed over something that resulted in enough of a knock to the paddle to bend the pin. It’s now straightened and reassembled, so with luck it’ll be fully functioning for the next outing.