I flew an airplane around Alaska in the 60's without a GPS or a VOR. We
used sectionals (which had large "uncharted areas) and pilotage (DR).
Sailed the windward, leeward, virgin islands and Bahamas in the 90's
without a GPS. Used charts, compass, knowledge of tides and currents,
coast pilot, dr and guide books. Never had a GPS until about three years
ago. Turning GPS off will not make all planes crash and ships run
aground. Learn how to navigate!.
krj

wrote:

Having read the responses to and comments on my original post, I am
still left with a few questions:

If I am on the Bahama Bank or in the Bahamian Exumas or in Hawk Channel
off Key Largo or in a bay or "river" or "creek" off the Chesapeake Bay,
negotiating shoals on a cloudy and windy day and GPS goes out because
it was suddenly turned off, is that not an "end" for me?

Does anyone believe or expect GPS to be turned off only for a few
minutes or hours? I would expect weeks to months, or longer, of "ended"
signals.

And mo Would anyone want to be in a commercial or private airplane
when making an initial approach in low ceiling weather to landing and
having GPS suddenly go off? This may well be an "end."