Comair has the top secret PPAS. Basically a book with the most optimum numbers for our old aircraft. Generally 290kias until we reach the cruise mach which could be anything from .65 to .74 depending on weight, temp, and wind and then we'll climb at that mach until cruise then that could be as fast as 0.8 with a strong headwind. Also during the climb if we need to get higher or maintain a certain climb rate it allows us to fly really slow. 250 is the min without the book but with the book it is much slower. It also has a section for descent.