On Oct 27, 12:01*pm, Greg Arnold wrote:
Does a newer logger (such as the one in the PowerFlarm) work OK with an
L-Nav, or is there a reason for an L-Nav owner to keep the old model 20
logger?

Flarm logger is independant of other stuff.
If the system you have now uses integrated LNav/Model 20/ PDA or other
display you have a working system.
Delete the Model 20 and you have nothing to accept ASI info from the
LNav and process to get real wind calculation.
Flarm does no navigation, just safety info and logging.
If you have another vario/ glide computer/ display, then this doesn't
matter.
In any case, Model 20 is a good back up.
FWIW-
UH