When we used to share a narrowboat, we followed the week after a single hander. All week I kept saying that the centre rope was too long. As I jumped on board with the rope after holding the boat back, it was getting tangled all over the place. Wish I had cut it shorter!
Just going through the bottom lock of the Napton flight on the way to return to base at end of holiday when I pushed the boat out jumped on, pulled in the too too long rope (or so I thought) when BANG! the prop caught the rope. It pulled tight (obviously) and smacked across my legs. I have never before seen instant bruising! OH pulled boat into lock, we went down the lock, he pulled the boat out and then had to cut the rope. It was certainly much shorter then. As I very nearly was because if that rope had been a loop, I would have lost one of, if not both my legs!
Both legs were black from the knee and over the next few days down to my toes. A month later the right leg ulcerated from inside and it took months to heal. I still have a bullet hole in my leg (well thats' what I tell people it is!)
In response to PhilR, I do not leave paddles open nor rudders grounded on cills. Accident do happen and we are not all perfect although a few on this forum do seem to think they are!
When you are doing anything in life it is not always possible to get it right. I blame no one but myself for my accident as I kept saying the rope was too long all week but being a shared boat, cutting the rope is destroying others property! I discovered a mention of this accident on line written by the boaters following us through in their blog!
I was very very lucky and agree with Carl the rope must not be too long so as to get caught round the prop, it is too unwieldy for day to day use no matter how careful you are, accidents do happen.