Apple Apple Watch Ultra

SaferProducts.gov consumer incident report 20260801-3F0C6-2147313041. Severity: Incident, No Injury. Product: Apple Apple Watch Ultra (Apple Watch Ultra (1st generation, 2022 model), 49mm aerospace-grade titanium case, silver/natural titanium finish, with Midnight Ocean Band. GPS + Cellular. A rugged smartwatch marketed by Apple for outdoor and water sports, including recreational scuba diving to 40 meters via the built-in depth gauge and the [REDACTED] dive application. The device was being used as a dive computer at the time of failure.). Incident: On July 4, 2026, I was scuba diving at approximately 100 feet of depth off Guanacaste, Costa Rica, using an Apple Watch Ultra as my dive computer. The watch was running the [REDACTED] dive application, which Apple markets and sells for recreational scuba use on this device. While at depth and in active dive mode, the watch began spontaneously and repeatedly resetting, displaying the Apple boot logo and restarting. It then displayed a temperature/thermal-warning screen (thermometer indicator) and a prompt to restore, before powering down entirely. When I surfaced, the front glass of the watch was visibly raised above the protective titanium bezel, protruding outward in a manner consistent with internal lithium-battery swelling. The glass has since receded into the housing, but the device has not powered on since and is permanently inoperable. This is a safety-critical failure. A dive computer provides depth, elapsed bottom time, and ascent-rate information on which a diver depends for safe ascent and avoidance of decompression injury. Losing that information at depth creates a serious risk of injury or death. At the time of the failure I was at 100 feet with large marine predators present and was forced to divert my attention to the malfunctioning device. I am an Advanced Open Water certified diver and managed the situation without harm, but a less experienced diver in the same circumstances could have been seriously inj