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- Path: sparky!uunet!munnari.oz.au!network.ucsd.edu!ucsbcsl!spectrum.CMC.COM!smrtstr!shark.smartstar.com!ben
- From: ben@shark.smartstar.com (Benjamin Ellsworth)
- Newsgroups: rec.boats
- Subject: Re: Celestial vs. GPS (was Re: Bermuda Trip - 7/'93)
- Message-ID: <1992Dec28.193807.6974@smartstar.com>
- Date: 28 Dec 92 19:38:07 GMT
- References: <1992Dec15.213557.17851@atlastele.com>
- Sender: usenet@smartstar.com (Usenet News Administrators)
- Organization: SmartStar/Signal Technology
- Lines: 30
- Nntp-Posting-Host: shark.smartstar.com
-
- In article <1992Dec15.213557.17851@atlastele.com>, briang@atlastele.com (Brian Godfrey) writes:
- |> >I think many of these sailors would have been in serious trouble if they
- |> >had had power problems or GPS failures.
- |>
- |> So what if they drop and break their sextant, or drop it in the drink?
- |> What's the diff, really?
-
- The difference is in the complexity, hence reliability, of the device.
-
- Sextants are very very simple devices that rely on just a few very basic
- (i.e. reliable) laws of geometry and astronomy. They just don't fail
- that often, and perhaps most importantly, it is usually easy to tell when
- they have failed.
-
- A GPS or LORAN on the other hand relies on many, many other complex sub
- systems to operate. These subsystems are prone to failure, and of course
- the whole system is much less reliable than any of its parts. Perhaps
- most problematic, the system can fail in completely non-obvious ways.
-
- You're not likely to break your sextant, but when you do, you'll know it.
-
-
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