The 302 sends gps data to the PDA/PNA (XCSoar) and navigation is handled
by XCSoar. The only problem I know of with the 302 is that if it's left
unpowered for some period (about 3 months) the internal battery goes
dead and the gps can not then get the proper date. It must be returned
for service since it has to be opened which breaks the seal on the
unit. Because of the possible problem with the gps, I would not buy a
302 but, instead, would get a CNvXC.

I can't discuss the SN10b as I've never used one.

On 10/23/2015 9:11 AM, kirk.stant wrote:
On Thursday, October 22, 2015 at 6:24:54 PM UTC-5, wrote:

Another question- I know this was debated quite a while ago- but what are the pros and cons of the SN10b compared to the 302?
First - if you intend on keeping a mechanical vario, keep the Sage.

Comparing a 302 to an SN10 is a bit of an apples vs oranges situation; the 302 is a good TE audio vario with a built-in GPS and IGC logger, that can drive an external glide computer such as an Oudie or PNA/XCSoar combo. By itself, it doesn't give you navigation or glide information. I think it can do either electronic or TE probe for total energy calculations.

The SN10, on the other hand, is a combination TE audio vario (needs a good TE probe) and glide/nav/task computer, that is really optimized for racing and XC flying; it has a rudimentary moving map, keeps track of alternates, figures out excellent winds, and will give you great final glide guidance. However, it does not have a built-in GPS, so you have to provide that input. With a simple hockey puck GPS, it has a non-IGC logger (but approved for US racing and OLC). When coupled with a PowerFLARM brick, it can show FLARM data, and if hooked up with an external PNA (Oudie, for example), can send FLARM, vario, and wind data to the moving map software.

I admit I'm biased - all my friends who have 302s have trouble with them (c'mon, admit it!), while I've been using my SN10b for 14 years without a hiccup.

Kirk

--
Dan, 5J