Semi-related. Navy F/A-18 pilots were issued Garmin watches which have a built-in barometer/altimeter because the cabin altimeter gauge of their aircraft was difficult to read due to its size and location, and "its audible warnings are ineffective through the flight envelope." The watches, once issued to pilots, will alert them when cabin altitude reaches a preset threshold.

https://www.military.com/daily-news/2017/06/16/the-navy-is-i...

Then, allegedly a pilot crew was able to use the watch's compass to help navigate in an emergency after their cabin instruments frosted over:

https://www.defensenews.com/breaking-news/2018/02/23/flying-...