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Flashcards in WEATHER Deck (5)
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1
Q

What are the requirements for an alternate? (AIP GEN 3.5)

A
  • More than SCT below alternate minima;
  • Visibility less than alternate minima;
  • Visibility forecast with Prob% of fog, mist, dust etc;
  • X-Wind/Downwind component greater than aircraft maximum;
  • TS, SEV turbulence.
2
Q

What is CAVOK? (AIP GEN 3.5)

A
  • Visibility greater than 10km;
  • No significant cloud below 5000’ or below the highest 25nm MSA, whichever is greater, and no CB or TCB at any height;
  • Nil significant weather.
3
Q

What is the TAF validity?

A
  • Issued every 6hrs;
  • Valid for 24 or 30hrs, commencing 00, 06, 12 and 1800 UTC;
  • Must be valid for 30min before and 60min after planned arrival.
  • 5nm of aerodrome reference point;
  • Cloud height Above Aerodrome Level (AAL).
4
Q

What are the requirements for Special Alternate Minima (SAM)?

A
  • Dublicated LOC, G/P, Marker and VOR receivers, or;
  • One Marker and DME (assuming the aircraft has 2 x ADF systems when NDB is used for ILS);
  • Only available during tower hours, or;
  • When METAR/SPECI service is available;
  • HGS serviceable can be used if G/P is U/S.
5
Q

What is the wet runway policy?

A
  • Moderate/heavy rain;
  • TS;
  • INTER/TEMPO.

PROB is considered dry (even for TS or +RA)
SH or SHRA shall be deemed as insufficient to produce a wet runway also.