Mark,
In that case the display alarms
initially at the 12.30/01.00 LED, which is about where the other glider
is, when the tracks of the 2 aircraft appear to be intersecting but when
there also appears to be a reasonable height separation ..... and it looks
to me like there was not a "risk of collision".
The pilot then bears away to
starboard and turns back to port to fly directly at or
towards the other aircraft.
It looks to me that there is a
greater risk of collision after he turns back to port towards the other ship
when it is visible in his screen ........... yet the alarm doesn't sound again
until he is reasonably close.
So given your
explanation, why did it alert initially in this
case, and why didn't it continue to provide an alert when the pilot turned back
towards the other glider?
Regards Geoff
----- Original Message -----
Sent: Tuesday, October 25, 2005 8:38
AM
Subject: Re: [Aus-soaring] Zaon Flight
Systems collision avoidance
Mike Cleaver wrote:
[ FLARM ]
>
The unit contains an internal GPS engine and transmits GPS position
>
about once a second. It also receives other units' position over a
> range of around 3km and displays them as a conflict alert when they
get
> too close.
No, that's a common misconception. FLARM
emits a conflict alert
when they get too close *and there is a risk of
collision*.
Proximity with diverging headings won't cause an
alarm. Proximity
with converging headings will.
So it can be
used in a crowded thermal. It might be occasionally
annoying, but not
in the way that a lot of people who haven't quite
"got" the idea that it
isn't a basic proximity alarm seem to think.
It will deal with a gaggle
without constantly "going off", as long
as the gliders in the gaggle aren't
converging on each other.
(I'm not sure why you said "Correct in part"
as if I'd posted some
kind of inaccuracy, then went on to post a heap of
stuff which didn't
contradict any of my comments at all, only barely even
/addressed/ them,
and which was, itself, inaccurate :-)
-
mark
--------------------------------------------------------------------
I
tried an internal
modem,
[EMAIL PROTECTED]
but it hurt when I
walked.
Mark Newton
----- Voice: +61-4-1620-2223 ------------- Fax: +61-8-82231777
-----
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