Table of Contents
What does decision altitude mean?
decision altitude. A specified altitude or height in the precision approach or approach with vertical guidance at which a missed approach must be initiated if the required visual reference to continue the approach has not been established. Fonte1 INTERNATIONAL CIVIL AVIATION ORGANIZATION.
What is a CAT 1 approach?
“Category I (CAT I) operation” means a precision instrument approach and landing with a decision height not lower than 200 f. Page 1. “Category I (CAT I) operation” means a precision instrument approach and landing with a. decision height not lower than 200 feet (60 meters) and with either a visibility of not less than.
How is decision altitude determined?
It’s the lowest height/altitude in the approaching descent or a private place. If the pilot cannot determine the visual reference of the approach, the pilot must then initiate a missed approach. Typically a pilot will determine if the approach can be made safely by the time the aircraft reaches the decision height.
Are approach plate altitudes MSL or AGL?
Altitude is always AMSL, height is always AGL, and flight levels are always with reference to setting 1013 on your altimeter subscale.
What is OCA in aviation?
Obstacle Clearance Altitude/Height (OCA(H)): “The lowest altitude or the lowest height above the elevation of the relevant runway threshold or the aerodrome elevation as applicable, used in establishing compliance with appropriate obstacle clearance criteria”.
What is a Cat 3 ILS approach?
A category III A approach is a precision instrument approach and landing with no decision height or a decision height lower than 100ft (30m) and a runway visual range not less than 700ft (200m).
What is a cat 2 ILS?
The Cat II ILS has a DH of less than 200 feet, but not less than 100 feet, with visibility minimums of between 1,800 RVR and 1,200 RVR. Use of a Cat II ILS requires certain additional aircraft equipment, ground facilities, and pilot training.
How is OCA calculated?
The calculated OCA/H is the height of the highest obstacle, or equivalent missed approach obstacles, plus an aircraft-related allowance. In assessing these obstacles, the operational variables of the aircraft category, approach coupling, category of operation, and missed approach climb performance are considered.