Final answer:
The decision to retract or extend the landing gear depends on the phase of flight. During takeoff and landing, the landing gear is typically extended to provide stability and support. Once in the air, the landing gear is usually retracted to reduce drag and improve fuel efficiency.
Step-by-step explanation:
The question seems to be asking about landing gear operating speeds, specifically whether they should be retracted or extended. The decision to retract or extend the landing gear depends on the phase of flight. During takeoff and landing, the landing gear is typically extended to provide stability and support during the critical phases of flight. However, once the aircraft is in the air, the landing gear is usually retracted to reduce drag and improve fuel efficiency. The specific operating speeds for retracting or extending the landing gear will vary depending on the aircraft type and manufacturer.