On Jul 6, 7:25=A0am, 5Z <tserkow...@[EMAIL PROTECTED]
> wrote:
> On Jul 5, 10:21=A0pm, "COLIN LAMB" <k...@[EMAIL PROTECTED]
> wrote:
>
> > One problem with a transmit every minute, rather than 10 minutes,
would=
be
> > that it would shorten battery life considerably. =A0I am guessing it
wo=
uld
> > approximate 10% of the present battery life. =A0The 300 hours of
transm=
it
> > quoted would be reduced to 30 hours.
>
> See other SPOT threads, but as I understand it, the SPOT does transmit
> once a minute already. =A0It is a "blind" transmission, so there's no
> acknowledgment from the satellite. =A0So in live tracking, it transmits
> the same message 10 times, then updates the coordinates, and repeats.
>
> An OK is also transmitted repeatedly, that's why both LEDs will flash
> for 15-20 minutes after pressing OK.
>
> Again, this is all part of the design, which is targeted at the hiking
> market. =A0An aviation unit might also include an altitude.
>
> -Tom
I don't think SPOT retransmits SPOTcast (tracking) locations, , it
relies on just sending a new location every 10 minutes. Delays people
see in web site updates for SPOTcasting may be elsewhere in the
system.The SPOT unit retransmits OK and help messages, I believe 3
times over a 20 minute period. I beleive the most retransmission that
SPOT does is every five minutes continuously in 911 mode.
Darryl
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