NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Researchers spoof GPS signals to alter superyacht'scourse
From: Lu Abel
Date: 2014 Apr 28, 13:31 -0700
From: Lu Abel
Date: 2014 Apr 28, 13:31 -0700
I should have also mentioned that poor interface/display design was one of the major causes of the Three Mile Island nuclear reactor meltdown, the worst nuclear-related disaster in the US. The reactor lost cooling water (which, as you might guess, would lead to a meltdown), but the display of the problem was so poor and obscure that the plant operators did not recognize the problem until it was too late.
From: Lu Abel <NoReply_LuAbel@fer3.com>
To: luabel@ymail.com
Sent: Monday, April 28, 2014 1:21 PM
Subject: [NavList] Re: Researchers spoof GPS signals to alter superyacht'scourse
Peter, I totally, totally agree.
The only small item I recall from that incident is that the "GPS isn't working" icon was not in the middle of the screen but in some obscure corner, and it was very small. As someone who spent a great deal of his career designing human-computer interfaces, I am very sensitive to poor design that doesn't communicate effectively with the user in a task-oriented fashion. I think that the "GPS isn't working" should have been a huge, in-the-navigator's-face display, at least until the navigator acknowledged (and presumably logged) it.
From: Peter Smith <NoReply_PeterSmith@fer3.com>
To: luabel{at}ymail.com
Sent: Monday, April 28, 2014 12:26 PM
Subject: [NavList] Re: Researchers spoof GPS signals to alter superyacht'scourse
> ... But what a poor navigator, not to use "all available information" (eg compass headings).Sadly, nothing new. Remember the cruise ship _Royal Majesty_, which went aground east of Nantucket in 1995 because the GPS antenna was disconnected and the nav computer reverted to DR. During the entire trip from Bermuda, not one watch officer noticed that the position display was showing an error code, nor did anyone use any of the other available means (LORAN-C, Transit/SatNav, and celestial) to verify what was on the screen. Oh, and the fathometer, which could have warned of unexpected shoaling, was turned off.See http://www..ntsb.gov/doclib/reports/1997/mar9701.pdf
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