1. NPOLE
2. Those are energy management circles. The tool can be found via the off path descent page. When selected on the displays 2 rings around the position/aircraft appear. THe outter is a 'clean' ring the inner is a 'drag req'd' ring. If you are outside the first ring (idle power) you may find you are in a low energy situation and may need to use power. If you start getting inside the second ring - drag req'd. You may find yourslef getting hot/high etc. As long as you remain in between the two rings you are in a good position to fly an idle power approach.