What does the gear warning horn alert the crew about?

The gear warning horn is a critical safety feature in aircraft that alerts the crew when the landing gear is not in the proper position during landing. Specifically, it activates if the aircraft is nearing a landing configuration but the landing gear has not been extended. This audible warning serves as a reminder to ensure that the landing gear is deployed, allowing for a safe landing. Properly functioning landing gear is essential for the stability and safety of the aircraft during landing, and the warning horn plays a vital role in preventing accidents that could occur from landing with the gear retracted. Recognizing this safety mechanism underscores the importance of following pre-landing checklists to ensure all systems are functioning correctly.