What is the maximum speed during descent for the ERJ 170/175?

The maximum speed during descent for the ERJ 170/175 is 250 KIAS. This limitation is in place primarily for safety and operational efficiency. Maintaining a maximum speed of 250 knots during descent helps ensure that the aircraft remains within controlled flight parameters, particularly when transitioning through lower altitude environments where there may be increased air traffic and varying weather conditions.

Flying at this speed allows for better handling characteristics, reducing the risk of exceeding structural limits and enhancing the capability to manage the approach and landing phases effectively. This is also part of standard operating procedures to ensure compliant operations within controlled airspace, where speed restrictions are often imposed to manage the flow of traffic.

In contrast, the other options represent speeds that either exceed this limit for descent or do not apply to the specific operational envelope of the ERJ 170/175 during descent phases.