Has anyone else noticed a major flaw in this app? That is, that from time to
time it leaks? I believe the developers are aware of the problem and will
release a fix shortly.

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Mark Newton
Sent: 24 October 2012 16:54
To: Discussion of issues relating to Soaring in Australia.
Subject: Re: [Aus-soaring] Sky 1 Installation Update

On Wed, Oct 24, 2012 at 09:38:06AM +0800, Texler, Michael wrote:

 > I have have just installed something fantastic.
 > It is called Sky(TM).
 > It is applied to the entire outer surface of the canopy.
 > Although it is solar powered it doesn't need batteries, or a link to a  >
GPS unit or any extra holes drilled into your instrument panel.

It's a fairly mature product, but like any ancient system it has exhibited
some difficult to fix bugs and usability defects.

By far the worst aspect of Sky(TM) is that its rendering of other aircraft
defies basic user interface standards.  Modern systems have benefited from
quite a lot of psychological research which keeps harmless or trivial user
interface elements unobtrusive and promotes important elements to the
forefront of the user's attention, but Sky(tm) comes from an earlier
generation of systems where that wasn't always the case.

In particular, the most visually prominent Sky(TM) objects are the ones that
are least harmful and easiest to avoid (security in the cloud!).  The most
visually unobtrusive objects are the ones which can cause irretrievable data
loss if you accidentally interact with them, something that even the most
well-trained experts occasionally have trouble with.

If we were designing it today, we'd make other aircraft as prominent as
clouds, and perhaps impose a modal "Are you sure?" dialog when you touch
one, to make sure you're really intending to die in a crash before allowing
it to happen.

The architecture of Sky(TM) makes this usability deficiency very difficult
to fix.  In the same way that the UNIX community has greybeards who say that
"rm -rf /" is easy to avoid if you don't accidentally type it (but seem, to
a man, to have accidentally typed it themselves!), the Sky(TM) user
community is full of curmudgeons who claim that you can overcome its
usability deficiencies by adopting a "See and Avoid" strategy while
simultaneously entertaining us with bar stories about near
misses^H^H^H^H^H^Hhits, so perhaps part of the problem is architectural, and
part of it is lack of interest in finding a fix.

Meanwhile, newer users are working-around the deficiencies with toolkits
layered on top of Sky(TM), just like we layer GNOME and KDE on top of UNIX
to improve its usability.  There's an active development community engaged
in solving these problems with overlays such as FLARM, cheap ADSB-*
equipment, and various PDA applications. 

Best of luck to them, I say.

  - mark
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