On Wednesday, May 29, 2013 2:08:53 PM UTC-4, Morgan wrote:

There are also some clip-on audio varios from Flytec and Malletec that work great as well.

Towards the end of my training, I got a clip-on Flytec. I've found it hard to break the "look at the needle" habit. (My current plan is force myself to cover the dial when I'm thermaling.)

I'd suggest that audible variometers would best be introduced on day one of training, maybe even cover up the variometer dial until the student forms the habit of using the audio input.