This is what Andrew uses as well, watch his tack to cross the fleet:
Even simpler, Go Pros are technically illegal equipment on a laser when racing. Ditto, GPS and other tracking devices.He was lucky and the tack was very tight. a more aggressive racer in the 180 numbered boat might argue that he did not keep clear. Remember you do not have to impede or cause a course change to not keep clear (Ben Ainslie lost a protest in the 2004 Olympics the the French guy if memory serves). There was no contact and no avoiding action required but as the sailor thought he might need to that was enough to get him a DSQ.
Aside from that good technique especially in the tack but he does seem a little too far back in the boat to me (for flat water sailing), might just be the camera angle though.
Even simpler, Go Pros are technically illegal equipment on a laser when racing. Ditto, GPS and other tracking devices.