What full circle range scales are available in NAV MAP mode on the EHSI?

The full circle range scales available in NAV MAP mode on the Electronic Horizontal Situation Indicator (EHSI) are indeed 5, 10, 20, 40, 80, 160, 240, 320, and 1000 nautical miles. This range of scales allows pilots to effectively manage and assess their situational awareness over various distances, catering to different operational needs.

Having a broader selection of range scales enables pilots to zoom in for more detailed navigation and target tracking or zoom out for a wider situational overview, which is crucial for flight planning, navigation, and maintaining awareness of airspace and ground features. The inclusion of scales up to 1000 nautical miles allows for long-range navigation and situational awareness, even at significant distances from waypoints or airfields.

Understanding the capabilities of the EHSI and its range scales is essential for pilots in optimizing their navigation strategies and enhancing safety during operations.