During EDST configuration, which Sector Boundaries should be selected by default?

• A. High and Ultra-High
• B. Medium and High
• C. Ultra-Low and Low
• D. Low only

Answer: (C)

The main idea being tested is how EDST sets up the baseline vertical structure of sector boundaries. By starting with the two lowest boundaries—Ultra-Low and Low—you establish a complete and stable foundation for the bottom portion of airspace first. This ensures there are defined, well-supported boundaries where most surface-to-low-altitude operations occur, which is the core of a reliable initial configuration.

Choosing just the bottom two boundaries keeps the setup simple and reduces the risk of misconfiguring higher layers. Higher altitude boundaries (Medium, High, Ultra-High) can be added later if and when there’s a need for finer granularity at higher levels, but they aren’t required to boot up or operate safely in the initial setup. Leaving the bottom layer incomplete, such as selecting only Low or omitting Ultra-Low, would leave gaps in the lowest airspace, complicating boundary assignments right away.