Cailean has got a great post on his blog about just how difficult it is to see you when just your head and shoulders are popping out of the water.
Just because you can see your friends when you are out paddling, doesn't mean that you can be seen from a boat nearby, or from shore. I discovered that when I was out on a ferry in Toronto one summer afternoon. While crossing the harbour, I was looking for the kayakers that I knew where out there. When I finally spotted them, I was amazed at how difficult it was to see them even though they were fairly close to the ferry. They were hard to see because of my height out of the water.
So, what colour is best to be seen? I'm not completely sure as everybody seems to have an opinion, I do know that talking to SAR helicopter pilots, ivory or white hulls just look like white caps on the water...
Got an opinion? Post it below.