Watch this video in 360° mode by clicking on the "Youtube" button at the bottom left of the video. It will only display properly in desktop browsers and the Youtube app.  If you are watching in the Youtube app on a mobile device you can move your device around to change your view. If your browser doesn't support a 360° view you can watch a standard video at https://youtu.be/WMRNegp9Yh0.

While Kirsty and I were sailing our CS17 Mk3, we came across a large patch of flattened water off Sandringham. There was a very clear delimiter between where the water was flat, and where the water was being ruffled by the wind, but it wasn't simply a matter of there being no wind blowing across the water there. The edge of the patch had a lot of muck on the surface. We wondered if this was this just runoff from the Yarra River after the rain events last week, or if it is the start of an algal bloom.