What is the minimum climb speed once transitioning to MACH speed?

The minimum climb speed when transitioning to MACH speed is established in the aircraft's operational limitations to ensure optimal performance and safety during ascent. When the aircraft reaches the transition from airspeed measured in knots to speed measured in MACH, it is critical for pilots to reference the required speeds that support efficient climb profiles and engine performance.

In the case of the SkyWest CRJ 200, a transition to .70 Mach reflects a balance between aerodynamic efficiency and engine capability, allowing for an effective climb rate while minimizing the risk of exceeding structural limits or engine performance thresholds. This speed ensures safe operations in the high-altitude environment that might be encountered during flight, providing adequate margins to prevent complications associated with both stall and excessive drag.

Thus, the minimum climb speed of .70 Mach is the appropriate choice in this context, as it adheres to the operational performance standards set to maintain safety and efficiency during climb at high altitude.