Alternates

Question 1

Acronym

Answer 1

123 1500/2 MMOISTRS 3585

Question 2

Domestic

Answer 2

No alternate is required if, for at

least +-1hr of ETA wx is 2000’ and 3sm.

Question 3

FLAG

Answer 3

No Alternate is required if wx 123++
Greater of:
• 2000 or +1500 above the lowest IAP mins
• 3sm or +2sm more than lowest applicable
visibility minimum

Question 4

Marginal Weather

Answer 4

Weather is considered “marginal” if wx within…
• Dest Mins (Cat 1) within 100 or 1/2
• Derived Alt Mins within 100 or 1/2

(Marginal wx requires second Alternate)

Question 5

Method 1

Answer 5

Obstacle Clearance 1000/5 V1 to Land

Takeoff Alternate must be Method 1

Question 6

Method 2

Answer 6

Obstacle Clearance 2000/5

• Drifftdown ALT is required along the route

Question 7

Offline Charters

Answer 7

Require Alternate

Question 8

International

Answer 8

• International – Airports with 1 Runway
• Flight time > 6 Hours
• If both GPS lost, IRS only good for 6.2 hours
• Vol II / Operating Limitations / Aircraft and Aircraft
  Systems Limitations / RNP-10 2.10.10

Question 9

Severe Icing

Answer 9

Severe Icing +/- 1 Hour

Question 10

Thunderstorms

Answer 10

Thunderstorms +/- 1 Hour
• Alternate and 45 minutes or more of
contingency fuel will be added

Question 11

RNAV (RNP or GPS) only Approach

Answer 11

To an airport based solely on the availability of an RNAV (GPS or RNP) approach must always have a destination alternate with a suitable non-RNAV approach available (e.g., ILS, LOC, VOR)

Question 12

Supplemental

Answer 12

Supplemental will be noted on your Dispatch Release.