Document ID: chunk:federal_register_of_legislation:F2024C01173:reg:6:p3
Version: federal_register_of_legislation:F2024C01173
Segment Type: reg
Provision Reference: reg 6 (pt 3/7)
Character Range: 97095–99872

of the base of the lowest layer of cloud below 6 000 metres (20 000 feet) covering more than half the sky."
 (7) Subsection (5) does not apply if the authorised weather forecast being used:
 (a) is a TAF3; and
 (b) the time period associated with the probability indicator is within the first 3 hours of the period of validity of the forecast, provided that none of the estimated time of use of the aerodrome by the aeroplane is outside the end time (if any) specified for the TAF3 service.

MELs
 (8) If a flight of an aeroplane is conducted using an aeroplane with an inoperative piece of equipment permitted by a MEL for the aeroplane, any limitation of the MEL specified or consequent to flight with the item inoperative, must be taken into consideration when determining the landing minima or the relevant weather conditions for the flight.

4.07  Take-off alternate aerodromes

Requirements
 (1) A take‑off alternate aerodrome must be planned for a flight, before the flight commences, if:
 (a) the authorised weather forecast for the departure aerodrome indicates that, during the period of time mentioned in subsection (2), relevant weather conditions are forecast to exist below the landing minima mentioned in subsection (3); or
 (b) it would not be possible for the aeroplane, after taking off from the departure aerodrome, to return to that aerodrome for other reasons.
 (2) For paragraph (1)(a), the period of time commences 30 minutes before, and ceases 30 minutes after, the aeroplane's estimated time of departure at the aerodrome.
 (3) For paragraph (1)(a), the landing minima are those which:
 (a) meet the landing minima requirements; and
 (b) are appropriately adjusted to account for an assumption that the landing at that aerodrome will be conducted with one engine inoperative.
Note 1: See the CASR Dictionary for the definition of landing minima. The landing minima requirements are prescribed in the Part 91 MOS under paragraph 91.307(1)(b) of CASR: see Chapter 15 of the Part 91 MOS.
Note 2: A take-off alternate aerodrome is an alternate aerodrome at which an aeroplane would be able to land should this become necessary: see the note to the definition of alternate aerodrome in section 1.04. Factors that could be considered in determining whether the aeroplane would be able to land at the aerodrome would include:
(a) aerodrome runway lighting; and
(b) the forecast aerodrome weather conditions.
Note 3: One engine inoperative missed approach climb requirements for aeroplane performance do not apply at a take‑off alternate aerodrome: see subsection 9.12(1).
 (4) A take‑off alternate aerodrome that is planned for a flight must:
 (a) be available for use; and
 (b) meet the requirements in subsections (5) to (8).

Distance of take-off alternate