What function would be used to zoom in on a specific area on a navigation chart?

The function used to zoom in on a specific area on a navigation chart is designed to enhance visibility and detail for that particular section. Zooming allows the navigator to closely examine the features of the chart, such as depths, landmarks, and navigational aids, which are crucial for accurate navigation and risk management.

When performing this function, the user can pinpoint areas of interest and observe them in greater detail, making navigation safer and more precise. It is a fundamental tool in both digital and traditional navigation chart usage, giving users the control to adjust the view of the chart to their specific needs.

While other terms like scale, shift, and expand may relate to altering the view or dimensions of a chart, they do not specifically indicate the focus of increasing detail on a particular section, which is the primary purpose of the zoom function. Each of those other options represents different processes; for example, scaling may adjust the overall size of the chart without focusing on a specific area, and shifting refers to moving the chart view rather than enlarging a section.