Which instruments utilize Pitot Static pressure?

The correct answer is that airspeed, altimeter, and vertical speed indicator (VSI) all utilize Pitot Static pressure. Understanding how these instruments work in conjunction with the Pitot Static system is crucial for a commercial pilot.

The airspeed indicator is directly connected to the Pitot tube, which measures dynamic air pressure as the aircraft moves through the air. This dynamic pressure is then compared to the static pressure from the static port, allowing the airspeed indicator to display the aircraft's speed relative to the surrounding air.

The altimeter also relies on static pressure; it measures the atmospheric pressure outside the aircraft to determine altitude. As the aircraft ascends or descends, the change in static pressure is what allows the altimeter to provide an accurate reading of altitude above sea level.

The VSI functions similarly, using static pressure to measure the rate of climb or descent. It detects changes in static pressure over time, providing the pilot with a visual indication of whether the aircraft is climbing or descending and at what rate.

In summary, the integration of both dynamic and static pressures from the Pitot and static systems is essential for these instruments. They provide critical flight information necessary for safe aircraft operation.