Hi, @Helen3 Thanks for replying to my question. This is the second time I'm trying to respond to you I think my first reply was wiped out, so I'm trying again. If you get two replies saying the same thing, you'll know why.
I had tried to get liability insurance on the kayak from the same company that ensures my boats. They wouldn't insure it because my old, second-hand kayak is not stamped with the model, date of manufacture and serial number. I will look for a local insurance company that understands coastal living. Kayaks are very common here. Maybe they will insure it.