The popular range of Apple Watches now includes a model called Ultra, which features a new depth gauge. "It also delivers the data and functionality required by scuba and freedivers for descents down to 40 meters," Apple writes. As immensely feature-rich as these sports watches have become, a 40m depth limit appears to be a bit tight. That said, as most recreational divers would not or should not venture any deeper, it may not be much of an issue. The diving app, Oceanic+, which includes all the core features divers need, has been developed in collaboration with Huish Outdoors.