A blow-through-jibe in 20 knots, going into the bottom mark, requires sharp coordination among everyone, from bow to stern. Here, once tactician Andy Horton makes the call, Ian Walker confidently carves the boat into the turn. In a split-second, the boom whips across and fills with a shudder. Facing aft and not missing a beat is runner caddy, Mal Parker, who intuitively knows when it’s time to release the new leeward runner. The noise is deafening as thousands of pounds of pressure bear down on winches and blocks. The whole maneuver happens, from start to finish, in less than 15 seconds.