What is the minimum decision height for a CAT II operation if the AFM specifies a DH of 80 feet, the OCH is 90 feet, and the flight crew is qualified to 100 feet?

The DH should be 100 ft, because it is the highest of the minimum DH specified in the AFM (80 ft), the OCH (90 ft), the DH to which the flight crew is qualified (100 ft), and 100 ft.

If a Category A aeroplane has a DH of 200 feet, what is the minimum RVR for a CAT II operation?

The table does not provide a value for DH 200 ft; the highest DH listed is 199 ft, so the minima for DH 141-199 ft (450 m) would apply, but the question is not directly answered by the section.

AMC1 SPA.LVO.100(b) Low-visibility operations and operations with operational credits

Q: What device should be used to determine the DH for CAT II operations?

A radio altimeter or other device capable of providing equivalent performance.

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AMC1 SPA.LVO.100(b) Low-visibility operations and operations with operational credits

ED Decision 2022/012/R

INSTRUMENT APPROACH OPERATIONS IN LOW-VISIBILITY CONDITIONS — CAT II OPERATIONS

For CAT II operations, the following should apply:

(a) The DH should be determined by the use of a radio altimeter or other device capable of providing equivalent performance and be not lower than the highest of:

(1) the minimum DH specified in the AFM, if stated;

(2) the applicable obstacle clearance height (OCH) for the category of aircraft;

(3) the DH to which the flight crew is qualified to operate; or

(4) 100 ft.

(b) The lowest RVR minima to be used are specified in Table 4:

Table 4

CAT II operation minima: RVR (m) versus DH (ft)

Aircraft categories		Auto-coupled or HUD to below DH*
Aircraft categories		A, B, C	D
DH (ft)	100–120	300	300/350*
	121–140	400	400
	141–199	450	450

* An RVR of 300 m may be used for a Category D aeroplane conducting an autoland or using HUDLS to touchdown.

Details

Source-Title: AMC1 SPA.LVO.100(b) Low-visibility operations and operations with operational credits View latest amendments

Erulesid: ERULES-1963177438-19788 Compare versions

Domain: Air operations

Applicabilitydate: 30 October, 2022

Entryintoforcedate: 1 July, 2022

Regulatorysource: ED Decision 2022/012/R Navigate

Regulatorysubject: Part-SPA

Typeofcontent: AMC to IR (Acceptable means of compliance to implementing rule)

Parentir: SPA.LVO.100 Low-visibility operations and operations with operational credits

Origin: EASA

Category: EAR