How should an aircraft descend when transitioning from 0.70 IMN?

When an aircraft is transitioning from 0.70 indicated Mach Number (IMN) during descent, the appropriate action is to transition to 250 knots indicated airspeed (KIAS). This is primarily due to airspeed limits commonly imposed by regulations when below 10,000 feet.

At speeds of 0.70 IMN, the aircraft is likely experiencing a higher true airspeed than 250 KIAS, especially at lower altitudes where the air is denser. Transitioning to 250 KIAS during descent manages the aircraft's speed in a controlled manner, ensuring compliance with regulatory requirements while maintaining safety and efficiency during the descent phase.

It’s essential in aviation operations to adhere to these speed restrictions to prevent excessive acceleration, which can lead to control issues or exceed operational limitations of the aircraft. Thus, transitioning to 250 KIAS is a standard practice to ensure a safe and orderly descent.