There is a warning on the TomTom site - and today I received an email from
them regarding an older Garmin Etrex unit I own. It said in brief:
=======================
Due to the upcoming WNRO on 6 April 2019, the performance of your device
will be impacted.
While we no longer offer content and service updates for your device, we
have made an update available that addresses the GPS Week Number Rollover
(WNRO).
TO UPDATE: Connect your device to your computer. Click the 'update now'
button for instructions​ on how to update your device.
=======================
The message included the serial number of my device, so I suppose I must
have registered it after purchasing it. The warning page is here:
https://www.tomtom.com/en_us/updates/
Bob NW8L
On Wed, 3 Apr 2019, n...@zianet.com wrote:
Fred Jensen writes:
Eventually, the 10-bit register holding the week number will overflow and
reset to zero. That's all that's happening, it happens every 1,024 weeks,
the first was in Aug 1999.
The GPS reset has been the source of hysteria in various circles, including
exhaustive discussions on the various private pilot and drone forums, since
most aircraft and drones use GPS for real time positioning and navigation
while in flight.
In short, when this happened in 1999, changes were made to lengthen the roll
over period to beyond our lifetime. The April 6 rollover only effects older
GPS devices with the 10-bit registers. Basically, every GPS embedded device
made in the last 10-15 years or so will not be affected - only the first
generation devices.
There are absolutely no warnings or cautions on the websites for Garmin,
Magellan, or Trimble showing it is a non-issue for their GPS devices - not
even mentioned. The FAA has a list of the very few GPS devices used in older
private aircraft that could be effected, only if in flight when the rollover
occurs. With 10,000+ people in the air at any moment, there would be a huge
air of caution by the FAA and airlines if the rollover had any chance of
effecting the GPS devices now in use. In this case, "Silence is golden."
73, Paul NA5N
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
