Document ID: chunk:federal_register_of_legislation:F2025C00187:front:0:p12
Version: federal_register_of_legislation:F2025C00187
Segment Type: other
Provision Reference: 
Character Range: 39737–42631

of the CASR Dictionary.
Australian FIR has the meaning given to flight information region in the Airspace Regulations 2007.
authorised aeronautical information: see the CASR Dictionary.
authorised weather forecast has the meaning given by Part 1 of the CASR Dictionary.
authorised weather report has the meaning given by Part 1 of the CASR Dictionary.
avoid area of the HV curve, of a rotorcraft, means the area delineated on the height‑velocity envelope diagram in the AFM, that shows the parameters within which operations of the rotorcraft should be avoided.
AWIS, or automated weather information service, means an aerodrome weather information service, provide by an aerodrome operator:
(a) that provides actual weather conditions at the aerodrome, via telephone or broadcast; and
(b) the data for which is obtained from an AWS operated or approved by the BOM.
AWS means automatic weather station.
BECMG, in relation to a weather forecast, has the same meaning as in ICAO Document 8896.
Note   At the commencement of this instrument, ICAO Document 8896 included the following: "BECMG (abbreviation for "becoming") — this change indicator describes changes where the conditions are expected to reach or pass specified values at a regular or irregular rate.".
BKN, in relation to amounts of cloud, has the same meaning as in ICAO Document 8896.
Note   At the commencement of this instrument, ICAO Document 8896 refers to BKN as 5-7 oktas of cloud. "Okta" is a standard unit of measurement for cloud cover.
BOM means the Bureau of Meteorology.
CAO means Civil Aviation Order.
CAR means the Civil Aviation Regulations 1988.
CASR means the Civil Aviation Safety Regulations 1998.
CASR Dictionary means the Dictionary under regulation 1.004 of CASR.
CAT means category.
Category A, in relation to a rotorcraft, means a multi-engine rotorcraft that is:
(a) designed with engine and system isolation features stated for Category A requirements in any of the following:
           (i) Part 27 of the Federal Aviation Regulations (FARs);
           (ii) Part 29 of the FARs;
           (iii) EASA CS — 27;
           (iv) EASA CS — 29;
           (v) an equivalent airworthiness certification code of a Contracting State; and
(b) capable of operation using scheduled take-off and landing data under a critical engine failure concept, which assures adequate designated ground or water area and adequate performance capability for continued safe flight or safe rejected take off in the event of engine failure, as mentioned in the rotorcraft's flight manual.
Note   This definition is based on the ICAO, FAA and EASA definitions of the term Category A in relation to rotorcraft.
Category A performance, for a rotorcraft operation, means the 1 engine inoperative performance (as derived from the rotorcraft flight manual) from which the pilot in command determines the most critical maximum weight that