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Jan 31, 2018 at 11:35 answer added kevin timeline score: 3
Jan 31, 2018 at 10:04 answer added RAC timeline score: 0
Jan 30, 2018 at 20:54 answer added Steven Hall timeline score: 0
Jan 30, 2018 at 20:50 comment added user I would expect the regulations to impose requirements on the results (such as a given likelihood of a failure of a system within so-and-so many flight hours), not on how those results are achieved.
Jan 30, 2018 at 18:15 comment added Ron Beyer @GdD Selective Availability has been discontinued for almost 20 years (since 2000). The new GPS Block IIIA launching this year don't have the capability anymore.
Jan 30, 2018 at 15:50 history edited Ron Beyer CC BY-SA 3.0
added 4 characters in body; edited title
Jan 30, 2018 at 15:30 comment added GdD I don't think there's any regulation that says they must be fitted @Ghilardi, it's more of the fact they are still needed. GPS isn't 100% reliable, the US military holds the keys and can turn the system off if desired.
Jan 30, 2018 at 15:20 comment added Dave Not quite a dupe but you can find the answer here
Jan 30, 2018 at 14:48 history asked Andrea Ghilardi CC BY-SA 3.0