Which instrument is located on both the pilot and co-pilot instrument panels?

The Rate-of-Climb Indicator is an instrument that measures the vertical speed of an aircraft in terms of feet per minute. This instrument is essential for both the pilot and co-pilot to maintain situational awareness during climbs and descents. Since both crew members need to monitor the aircraft’s performance during these critical phases of flight, the Rate-of-Climb Indicator is typically found on both instrument panels.

The importance of this instrument lies in its function to provide real-time feedback about the aircraft's vertical trajectory, which helps in making informed decisions regarding climb rates, descent rates, and overall flight safety.

In contrast, while the True Airspeed Indicator, Attitude Director Indicator, and Airspeed Indicator are important instruments, they may have different configurations or locations depending on the particular aircraft’s design and systems. The Rate-of-Climb Indicator, however, is generally standardized for both pilots to enhance coordination and safety during flight operations.