On Monday, 28 May 2018 20:50:46 UTC+1, Mike Reid wrote:
That's why I was asking. The Stemme S12 on display in Reno this spring had a Garmin Aera 660 and an LX9070. Having never used a gliding computer, I was curious what capabilities the LX9070 was missing that necessitated the Garmin.

Mike

They are both computers which know where they are and display it on a moving map. They both give navigation advice and airspace warnings. However, their software and other features are optimized for different types of flying - whereas the Stemme is designed for both types!

Things the Garmin might offer, not available in the LX:
Detailed airfield details and plans
Integration with different weather and traffic services
Local fuel prices
IFR map mode
Obstacles database
Quicker lookup of map features using touch screen

Things the LX offers
Rules of glider competition and badge flying
Specific navigation and performance reporting ref the above
Route optimisation for some task types
Accurate wind calculation
Glide information to waypoint, end of task, and alternates, taking into account wind, glider performance and Macready (expected average thermal strength)
Artificial horizon
Voice warnings for all sorts of things
Very customisable multiple screen layouts
High performance vario and speed to fly indicator with audio
Integration with glider hardware - e.g. recommended flap setting with flap sensor, gear sensor, link to radio to load frequency for near airfields (Garmin also offers that)
Creation of secure 'IGC format' log file suitable for glider competitions and badges

Apart from all the above, it can be useful to have more than one GPS, for example having them on different zoom settings. And some things are more easily done with a touch screen (which the Garmin has), others with knobs and buttons (the LX approach).