Apple Newsroom has a long feature story on Oceanic+, an app that turns Apple Watch Ultra into a serious dive computer, and which was previewed extensively during the Ultra’s introduction:
“One of our first goals was to keep it intuitive,” says [CEO] Mike Huish. “People who know how to use an Apple Watch already
know how to use this dive computer, because it’s telling them
things in a simple format they can understand. The navigation
menus are simple — scrolling with the Digital Crown and using the
Action button, you can navigate and use all the functionality of
the dive computer while diving.”
Recreational scuba diving is a niche, but people who are into it are really into it. I think that’s why Apple partnered with Huish Outdoors (makers of Oceanic+) while the Ultra was in development. With diving, it was essential to partner with a company divers already know and trust.