PI.VIII.B.R7
Risk managementContinuing to descend below the Decision Altitude (DA)/Decision Height (DH) when the required visual references are not visible.
From the FAA library
- Chapter 4: Approaches › Minimum Descent Altitude (MDA), Decision Altitude (DA), And Decision Height (DH)
Minimum Descent Altitude (MDA), Decision Altitude (DA), And Decision Height (DH) MDA—the lowest altitude, expressed in feet MSL, to which descent is authorized on final approach or during circle-to land maneuvering in execution of a standard instrument approach ... procedure (SIAP) where no electronic glideslope is provided. DA—a specified altitude in the precision approach at which a missed approach must be initiated if the required visual reference to continue the approach has not been established. DH—with respect…
- Pilot/Controller Glossary › D
Used by ATC. Areas of airspace that may be activated in response to unplanned falling debris in the NAS. DECISION ALTITUDE/DECISION HEIGHT [ICAO Annex 6]- A specified altitude or height (A/H) in the precision approach at which a missed approach ... must be initiated if the required visual reference to continue the approach has not been established. 1. Decision altitude (DA) is referenced to mean sea level and decision height (DH) is referenced to the threshold elevation. 2. Category…
- Chapter 5. Air Traffic Procedures › Section 4. Arrival Procedures › 5-4-22. Use of Enhanced Flight Vision Systems (EFVS) on Instrument Approaches
Additionally, recent flight experience and proficiency or competency check requirements apply to EFVS operations. These requirements are addressed in 14 CFR §§ 61.66, 91.1065, 121.441, Appendix F to part 121, 125.287, and 135.293. h. Enhanced Flight Visibility and Visual Reference Requirements ... descend below DA/DH or MDA during EFVS operations under 14 CFR § 91.176(a) or (b), a pilot must make a determination that the enhanced flight visibility observed by using an EFVS is not less than what is prescribed…
- Chapter 4: Approaches › Enhanced Flight Vision Systems (EFVS) and Instrument Approaches [Figure 4-10A]
Therefore, an EFVS cannot be used to satisfy the requirement that an identifiable part of the airport be distinctly visible to the pilot during a circling maneuver at or above MDA or while descending below MDA from a circling maneuver ... visual information provided by an EFVS serves as independent verification of the position information provided by the aircraft’s displays and systems. An EFVS also enables a pilot to assess the enhanced flight visibility and identify required visual references, helps…
- Chapter 4: Approaches › Transition to a Visual Approach
Transition to a Visual Approach The transition from instrument flight to visual flight during an instrument approach can be very challenging, especially during low visibility operations. Aircrews should use caution when transitioning to a visual approach at times of shallow ... Adequate visibility may not exist to allow flaring of the aircraft. Aircrews must always be prepared to execute a missed approach/go-around. Additionally, single-pilot operations make the transition even more challenging. Approaches with vertical guidance add to the safety…
- Glossary
Cross-check. The first fundamental skill of instrument flight, also known as “scan,” the continuous and logical observation of instruments for attitude and performance information. Cruise clearance. An ATC clearance issued to allow a pilot to conduct flight ... altitude from the minimum IFR altitude up to and including the altitude specified in the clearance. Also authorizes a pilot to proceed to and make an approach at the destination airport. Current induction. An electrical current being induced into…