On Jul 6, 7:25*am, 5Z wrote:
On Jul 5, 10:21*pm, "COLIN LAMB" wrote:

One problem with a transmit every minute, rather than 10 minutes, would be
that it would shorten battery life considerably. *I am guessing it would
approximate 10% of the present battery life. *The 300 hours of transmit
quoted would be reduced to 30 hours.

See other SPOT threads, but as I understand it, the SPOT does transmit
once a minute already. *It is a "blind" transmission, so there's no
acknowledgment from the satellite. *So 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. *An 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