How different is aviation GPS?
Stubby wrote:
A friend bought a 60CS recently and we noticed that my old Garmin-12 got
better reception and seemed more accurate. We called Garmin and the
fellow we talk with was surprised because both units use the same chips
inside!
I'm totally surprised, and a tad skeptical for a few reasons.
The 12 used a patch antenna, similar to the eMap and eTrex series. The
60 series uses a quadrafilar, which usually works much better. The 12
was very similar to the eMap in processing ability, which in my personal
hands-on experience is far better on the 60. The published accuracy of
the two units is different, notice that the 60 has a velocity spec much
better than the 12 in the following Garmin specs. Please note that the
velocity spec is so different, they don't even bother to use the same
unit of measurement.
60CS:
Update rate: 1/second, continuous
GPS accuracy:
Position: 15 meters, 95% typical*
Velocity: 0.05 meter/sec steady state
WAAS accuracy:
Position: 3 meters, 95% typical
Velocity: 0.05 meter/sec steady state
12CX:
Update Rate: 1 second, continuous
* Accuracy:
o Position: 15 meters (49 feet) RMS*
o 1-5 meters (3-15 feet) RMS with GarminŽ GBR 21 DGPS
receiver (optional)
* Velocity: 0.1 knot RMS steady state
Furthermore, the 12 series didn't use WAAS. Is something wrong with
your 60CS? G
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