As in the ancient joke re beer: "What do you expect; thunder and lightning?"
I have a couple of ancient hand-held Garmin GPSs, neither of which are unusable merely because the displays are illegible...
I imagine having a magnetic case is incompatible with having an inbuilt magnetometer. Maybe the built-in speakers that tablets usually have can be piezoelectric, or have speaker magnets that are well shielded.
My late Dad's Avo Model 7, which I have but doesn't work, must date from about then, too... (I bet he used it when building the TV on which we watched the Coronation!)
It's not a trivial thing to measure meaningfully. The further your sensor is from any fixed object, in order to be in clear and smooth flow, the more difficult it is to connect and ensure its safety!
Although that guide does not mention the sad fact about the UK passports historically being given a validity a decade from the previous passport's expiry instead a decade from the current issue date (which turned out no longer to be valid)...
Very nice, but I thought the question being asked was about road defaults. Which maybe depends on the category of road? And of course there are vehicle restrictions too...
Oh, do people have a windex as well as an electronic wind detector? We were considering how to cope with the latter having an outage...
Of course if you want your autopilot to steer by the wind a windex is not going to cut it!
But suffers from the compulsion to break the stories into chapters and intersperse with unrelated stories. Like many other documentaries. Pure irritation...