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The MABH or the altitude loss during automatic go around can be used by the airlines to determine the minimum DH in CAT III operation.
2.8 CONCEPT OF MINIMA
Regulations often use the term minima. In fact, this term could refer to different concepts:
1.  
Airfield operating minima: established in accordance with the airport authority and published on approach charts.

2.  
Operator's minima: lowest minima that an operator is allowed to use at a specified airfield, following an approval from its operational authority.

3.  
Crew minima: lowest minima that the crew is authorized to operate, depending on the crew qualification.

4.  
Aircraft minima: lowest minima which have been demonstrated during aircraft certification. These minima are indicated in the AFM.

For all CAT II / CAT III operations, these minima consist of a DH and an RVR.
CHAPTER 3
3. HOW TO GET APPROVAL
3.1  APPROVAL PROCESS
3.2  OPERATING MINIMA
3.3  FLIGHT CREW PROCEDURES
3.4  FLIGHT CREW TRAINING ATTACHMENT A: EXAMPLE OF CREW TRAINING
3.5  MAINTENANCE PROGRAMME
3.6  OPERATIONAL DEMONSTRATION
3.7  CONTINUOUS MONITORING
3.8  AUTOLAND IN CAT I OR BETTER WEATHER CONDITIONS
3.1 APPROVAL PROCESS
3.1.1 INTRODUCTION
Due to the very low visibility associated with CAT II / III operations, authorities strictly regulate all aspects of this type of operation, in order to maintain the general level of safety in air transportation .
Basically, four elements are strictly regulated (as shown Figure 3.1).
1.
The aircraft

2.
The airfield

3.
The operator

4.
The flight crew Figure 3.1

 

An operator applying for CAT II or CAT III operations must adhere to the rigid structure of the regulation to get the operational approval from his own authority.
This chapter should be considered as an aid to understand the requirements and as an operator's guide to get the operational approval.
3.1.2 PRINCIPLE OF APPROVAL PROCESS
The approval process may differ according to the various regulations but the general principle follows the same basic sequences set out below.
1. An operator which applies for a Category II or Category III approval must submit a file to his national authority. This file represents the official application. Basically, this file must include the following items.
1.1 Aircraft type
Extracts taken from the Flight Manual mainly addressing aircraftcertification status, list of required equipment for the intended mode of operations, the limitations, and the procedures following failures.
1.2 Airfield equipment
A description of the airfield equipment in accordance with ICAO standards for Category II/III, including visual and non-visual aids, runway characteristics, obstacle clearance area, RVR measurements, ATC procedures, etc.
　
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