1. Follow subsonic climb schedule from takeoff up to an altitude of 30,000 ft
2. At 30,000 ft, level off and accelerate to 610 kts in level flight.
3. Climb at a constant airspeed of 610 kts up to 36,000 ft.
4. At 36,000 ft, level off and accelerate up to Mach 1.8 in level flight.
5. Climb at a constant airspeed of Mach 1.8 up to the desired altitude.