So here we go into the ocean, lakes and reservoirs with kayaks, jet skis, and boats of all sizes moving at all speeds. Think about being in a speedboat going 30 miles an hour and being able to see a size 3 soccer ball floating 100 yards ahead (a football field). Sounds nearly impossible and then consider you have a skier off the back of your boat! Egads how can we stay safe?
Since the above picture was taken I have started bringing a buoy with me. Zone3 offers three different buoys in two colors; orange and bright pink. Some have storage and one even has a spot for a water/hydration bottle. My bright orange buoy straps around my waist and floats behind as I swim. Not much drag, but a lot more visibility. When we did our Zone3 wetsuit demos we received bright yellow caps. These are very visible as are other neon colors or even pink. Blue, green, and patterned caps are not nearly as visible.
So next time out focus on your sighting as well as being seen. BTW - there are 4 swimmers in the picture above!