IH.VI.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 10. Helicopter Operations › Section 1. Helicopter IFR Operations › 10-1-3. Helicopter Approach Procedures to VFR Heliports
These instrument procedures may be designed to guide the helicopter to a specific landing area (Proceed Visually) or to a point-in-space with a “Proceed VFR” segment. 1. An approach to a specific landing area. This type of approach ... missed approach point from which a landing can be accomplished with a maximum course change of 30 degrees. The visual segment from the MAP to the landing area is evaluated for obstacle hazards. These procedures are annotated: “PROCEED VISUALLY FROM…
- 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…
- Chapter 7: Helicopter Instrument Procedures › Standard Instrument Approach Procedures to an Airport
Helicopter use of standard instrument approach procedures. in values less than the appropriate 3⁄4 SM or 1 SM visibility requirement. The 14 CFR Part 97.3 visibility reduction rule does not apply, and you must take precautions to avoid ... obstacles in the visual segment. Procedures with penetrations of the final approach OIS are annotated at the next amendment with “Visibility Reduction by Helicopters NA.” Until all the affected SIAPs have been annotated, an understanding of how the standard visibilities…
- Pilot/Controller Glossary › I
INSTRUMENT LANDING SYSTEM.) ILS CATEGORIES- 1. Category I. An ILS approach procedure which provides for approach to a height above touchdown of not less than 200 feet and with runway visual range of not less than 1,800 feet ... Special Authorization Category I. An ILS approach procedure which provides for approach to a height above touchdown of not less than 150 feet and with runway visual range of not less than 1,400 feet, HUD to DH. 3. Category…