Although not a kayaker, this fisherman in his tinny collided with a powerboat sustaining serious injuries. As a regular paddler in the harbour I am very aware of the risk of being run over - particularly during the busy summer season when alcohol and inexperience is coupled with too much wealth! My strategy is to think like a cyclist on a busy road - wear fluorescent clothing during the day, flashing lights at night and assume that the other vehicle/boat hasn't seen you.
https://au.news.yahoo.com/thewest/video ... run/#page1
http://www.police.nsw.gov.au/news/lates ... w9MQ%3D%3D