Alternates COPY

Question 1

What is the mnemonic?

Answer 1

1-2-3 / 1500 + 2 / 2000 + 3 / MMOISTRS / 3585

Question 2

1-2-3

Answer 2

You ALWAYS need an alternate, UNLESS…

The basic 1-2-3 rule: 1 hour before to 1 hour after ETA, ceilings 2,000 or more, vis 3 SM or more.

Question 3

1500 + 2 / 2000 + 3

Answer 3

For flag operations:

vis: 3 miles (or 2 miles more than lowest approach mins, whichever is greater)
ceiling: 2,000 feet (or 1,500 feet above lowest approach mins, whichever is greater)

Question 4

M (1st)

Answer 4

Marginal:

• within 100 OR ½ of Cat 1 mins at destination
• AND within 100 OR ½ of DERIVED mins at 1st alternate
• then 2nd alternate required.

Question 5

M (2nd)

Answer 5

Method 2 Engine failure at cruise, clear all obstacles by 2,000 feet, 5 SM either side of route — but if failure occurs before reaching cruising alt, we need to be able to return to departure airport, or divert to a takeoff alternate using Method 1 calculations.

Question 6

O

Answer 6

Offline charters

Question 7

I

Answer 7

International

Question 8

S (1st)

Answer 8

Severe icing

Question 9

T

Answer 9

Thunderstorms

Question 10

R

Answer 10

RNAV only

Question 11

S (2nd)

Answer 11

Supplemental

Question 12

3585

Answer 12

3585

• destination = not less than ½ the vis for the expected approach
• 1st alternate = not less than ½ the DERIVED ceiling AND vis
• 2nd alternate = at or above DERIVED mins