What warning is initiated when the vertical velocity exceeds the limit with airspeed less than 60 kts?

The Sink Rate Warning is initiated when the vertical velocity surpasses the established limit while the aircraft's airspeed is below 60 knots. This warning is critical for maintaining safe flight, particularly during landing approaches where excessive descent rates can lead to hazardous situations such as hard landings or loss of control.

The importance of this warning lies in the context of flight safety; pilots need to be aware of their descent rate to avoid potentially dangerous conditions. The specific threshold of 60 knots is significant because it indicates a low-speed flight regime where the aircraft is more susceptible to issues related to high rates of descent.

In contrast, altitude warnings typically notify pilots about altitude constraints but do not specifically address vertical speed. A stall warning relates to the aircraft approaching the stall angle of attack, which is not directly connected to vertical velocity at low speed. Speed warnings focus on airspeed limits but do not consider vertical velocity concerns. As such, the Sink Rate Warning is uniquely positioned to alert pilots about critical flight parameters that require immediate attention during vulnerable phases of flight.