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guidance provided either by:
a) a ground-based navigation aid; or
b) computer generated navigation data.
Categories of precision approach and landing operations:
Category I (CAT I) operation. A precision instrument
approach and landing with a decision height not lower
than 60 m (200 ft) and with either a visibility not less
than 800 m or a runway visual range not less than
550 m.
Category II (CAT II) operation. A precision instrument
approach and landing with a decision height lower than
60 m (200 ft), but not lower than 30 m (100 ft), and a
runway visual range not less than 350 m.
Category IIIA (CAT IIIA) operation. A precision instrument
approach and landing with:
a) a decision height lower than 30 m (100 ft) or no
decision height; and
b) a runway visual range not less than 200 m.
Category IIIB (CAT IIIB) operation A precision instrument
approach and landing with:
a) a decision height lower than 15 m (50 ft) or no
decision height; and
b) a runway visual range less than 200 m but not less
than 50 m.
Category IIIC (CAT IIIC) operation. A precision
instrument approach and landing with no decision height
and no runway visual range limitations.
Note.- Where decision height (DH) and runway visual
range (RVR) fall into different categories of operation, the
instrument approach and landing operation would be
conducted in accordance with the requirements of the most
demanding category (e.g. an operation with a DH in the range
of CAT IIIA but with an RVR in the range of CAT IIIB would
be considered a CAT IIIB operation or an operation with a
DH in the range of CAT II but with an RVR in the range of
CAT I would be considered a CAT II operation).
Cabin crew member. A crew member who performs, in the
interest of safety of passengers, duties assigned by the
operator or the pilot-in-command of the aircraft, but who
shall not act as a flight crew member.
Commercial air transport operation. An aircraft operation
involving the transport of passengers, cargo or mail for
remuneration or hire.
Configuration deviation list (CDL). A list established by the
organization responsible for the type design with the
approval of the State of Design which identifies any
external parts of an aircraft type which may be missing at
the commencement of a flight, and which contains, where
necessary, any information on associated operating
limitations and performance correction.
Crew member. A person assigned by an operator to duty on an
aircraft during a flight duty period.
Cruising level. A level maintained during a significant portion
of a flight.
Dangerous goods. Articles or substances which are capable of
posing a risk to health, safety, property or the environment
and which are shown in the list of dangerous goods in the
Technical Instructions or which are classified according to
those Intructions.
Note.- Dangerous goods are classified in Annex 18,
Chapter 3.
Decision altitude (DA) or decision height (DH). 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.
Note 1.- Decision altitude (DA) is referenced to mean sea
level and decision height (DH) is referenced to the threshold
elevation.
Note 2.- The required visual reference means that section
of the visual aids or of the approach area which should have
been in view for suficient time for the pilot to have made an
assessment of the aircraft position and rate of change of
position, in relation to the desiredjlight path. In Category III
operations with a decision height the required visual reference
is that specified for the particular procedure and operation.
Note 3.- For convenience where both expressions are
used they may be written in the form "decision
altitudeheight" and abbreviated "DNH ".
Emergency locator transmitter (ELT). A generic tern
describing equipment which broadcast distinctive signals
on designated frequencies and, depending on application,
may be automatically activated by impact or be manually
activated. An ELT may be any of the following:
Automatic fixed ELT (ELT(AF)). An automatically
activated ELT which is permanently attached to an
aircraft.
Chapter I Annex 6 - Operation of Aircraft
Automatic portable ELT (ELT(AP)). An automatically Human performance. Human capabilities and limitations
activated ELT which is rigidly attached to an aircraft but which have an impact on the safety and efficiency of
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ICAO 附件6 Operation of Aircraft(17)
