ERAM Lab Procedures and SOP Practice Test 2026

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The EDST Inappropriate Altitude for Direction of Flight (IAFDOF) feature must be used in which mode?

The EDST Inappropriate Altitude for Direction of Flight (IAFDOF) feature must be used in the Automatic mode (i.e., IAFDOF Manual must remain deselected).

The feature is meant to run automatically so it can continuously monitor and enforce the relation between altitude and direction of flight without requiring manual input. When used in Automatic mode, the system automatically detects when the altitude is inappropriate for the current direction of flight and applies the intended safeguards. If you switch to Manual mode, the automatic protection is not active, meaning the check and any automatic adjustments or alerts rely on the operator, which defeats the safety purpose. Therefore, the correct practice is to operate in Automatic mode and keep Manual deselected.

IAFDOF must be used in Manual mode only.

IAFDOF can be used in either mode without restrictions.

IAFDOF should be disabled during Automatic mode.