Joe Allen is the Emirates Team New Zealand sailing coach. He spends a lot of time in a chase boat, watching the AC72 sail. He also spends a lot of time shooting video.

He’s interested in performance; boat performance and the crew work that produces it.

Could a tack or a gybe be slicker, smoother, more polished? Are all members of the sailing crew in the right place at the right time? Is everything coming together as it should be?

Joe also has fixed GoPro cameras placed strategically on the AC72. Every sailing moment of every sailing day is videoed. The cameras miss nothing.

Back on shore, Joe finds the answers to the questions when he analyses the footage. He reports his findings to the sailing team and his footage is in great demand from the design team.

Joe Allen explains all: