For the 600, I believe, at VFTO (White bug), you select power management to MCT, which in turn automatically selects the FDAU for white bug speed. You climb at that speed.
In the Older models, there are two white bug speeds. These can differ by upto 10knots. In icing conditions, on single engine, you climb at the lower white bug speed. In Normal conditions, with two engines, you use the higher speed. Confusing? Yes that's ATR for you.......
For the emergency brief, always brief the two speeds, as you might need to know the difference....
