Absolutely agree.. certainly one of the best 'sailing' movies in terms of realistic/real at-sea footage. The story line is good too,(no spoiler here).
I think in second place is a mediocre move called 'Wind' (a 12-meter Americas Cup story) but it had good racing footage.
I second the above.
Also, Jean Du Sud - the full length documentary of the circumnavigation by Yves Jelinas maker of Cape Horn wind vanes was very well done, albeit datednow. He did the first drone scene of a boat under sail... hooked a camera to a kite he made... Too bad the image quality is no longer good.