Next message: Bill: "Re: Perp procedure"
Lisa Fiene wrote:
> We're planning a passage to the Louisiades next season and yes, we'll be
> taking our morning noon and twilight sights also, plotting them on our
> sheets, checking our position against the GPS. Our attitude is that the
> GPS is a backup, not the other way around.
I do not see how one can maintain this attitude in the face of reality. In my
admittedly very limited experience of ten thousand off shore miles over the last
ten years I have not ONCE been in a situation where GPS didn't work, but cel nav
would. In fact, I have not once been in a situation at sea where GPS didn't work.
Full stop. But I have REPEATEDLY been in situations where celestial was
unavailable for several days in a row and GPS was the only position finding tool
available. Conclusion: Celestial is not even a backup!
Herbert Prinz
