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That and the fact that GPS is not a primary navigation source for commercial aviation. Just shows that being an expert in one domain means that ... you're an e

• t0mas88 8y ago
  It is. For a majority of the fleet RNP1 and RNAV5 use GPS as the primary means of navigation with INS as a backup for a limited amount of time if GPS is unavailable.
  • VBprogrammer 8y ago
    INS is much more than a backup. In the days before GPS it was the primary source of navigation crossing large bodies of water. Of course this meant aircraft coasted in a few miles off of there actual course. It can generally be updated using DME-DME fixes and from VOR fixes, all of which it does automatically. I believe some short haul operators are now specing there aircraft without INS but as far as I know that's an exception rather than the rule.
    • eisa01 8y ago
      Dropping INS is short-sighted, as GPS can be jammed. Russia has been jamming GPS signals in northern Norway during different military exercises [1]. Russia has denied this, but the foreign ministry has started to share the proof of this with them, [2, Norwegian only] [1] https://thebarentsobserver.com/en/security/2019/01/norway-tired-russian-military-gps-jamming-unacceptable-and-risky https://thebarentsobserver.com/en/security/2019/01/norway-ti... [2] https://www.vg.no/nyheter/innenriks/i/K38ee7/ud-har-gitt-russland-gps-bevis?utm_source=vgfront&utm_content=row-1 https://www.vg.no/nyheter/innenriks/i/K38ee7/ud-har-gitt-rus...