CDI (Course Deviation Indicator): Navigating with Precision

What does the lateral distance between dots on an HSI represent?

The lateral distance between dots on an HSI (Horizontal Situation Indicator) represents what?

Answer:

The lateral distance between dots on an HSI represents the deviation from the selected course or radial.

On an HSI, the lateral distance between dots, also known as the CDI (Course Deviation Indicator), is a crucial feature that helps pilots maintain situational awareness during flight. The CDI provides information about how far off track the aircraft is from the selected course or radial.

The lateral distance between dots is typically set to represent a standard deviation of ±0.5 NM (nautical miles) or ±1.0 NM from the chosen course or radial. This allows pilots to make adjustments to stay on course and navigate towards their desired destination or waypoint.

In some cases, the distance between dots can be adjusted to meet the specific navigation requirements of the flight. Pilots rely on the CDI to keep the aircraft on track and ensure a safe and accurate flight path.

Overall, the lateral distance between dots on an HSI plays a critical role in guiding pilots during flights, enabling them to make precise navigational decisions and reach their destinations efficiently.