I'm planning to film like that this summer, my idea was to take a PVC pipe with two lids, some lead at the bottom, and foam in the top so that it floats upright like a cork.
Then mount the camera on top and maybe put a windvane on it to keep it pointing in the right direction.
Anyone else have some ideas for mounting cameras?
Its a bit cold for sailing at the moment here, I heard they went training last weekend but lines and blocks froze up.
Picture taken yesterday from the boat park: