alternates and weather

Question 1

suitability of alternates

Answer 1

1. suitable as a planned destination aerodrome for the flight
2. doesnt need an alternate itself
3. isnt a helideck

Question 2

Part 91 AC at night must

Answer 2

plan an alternate if destination has no instrument approaches. or has no instrument approaches that the pilot can use.

Question 3

IFR flight Alt minemas

Answer 3

1. if ad has IA. then minemas published on chart.
2. by day only - if ad has no IA or pilot cant use the IA. then final rout segmant LSALT+500, 8k Vis

Question 4

need alternate when arrival time is within 30 mins prior to…

Answer 4

cloud - more than SCT below alt min
vis - less than alt min
vis - is greater than alt min BUT atleast 30% prob of fog, mist, dist, haze,
Wind - a crosswind or tailwin more than max for aircraft

Question 5

if a TAF is forcasting condition less than alt mins, then?

Answer 5

you need an alternate

Question 6

storms

Answer 6

you need and alt if your arrival time is within or during 30 mins of a storm minum prob30.