ASA and Latin American routes

[Freebrd]

"Sniff, Sniff"............I smell USAirways flying and a heck of an announcement in the coming weeks.

For ASA? C'mon give us a hint

 

[Speedtape]

Redispatch in flight? Can you explain that one?

 

[701EV]

Redispatch in flight? Can you explain that one?

Hey Speed,

That's what I'm for?

 

[clr4theapch]

Flag operations redispatching:

Redispatch in flight? Can you explain that one?

If your serious, here is the basic reason to redispatch a flight on a flag mission.

A way to decrease total fuel carried is to reduce international contingency fuel required by using a redispatch technique. Contingency fuel (called "international reserve fuel" in the United States), which is defined by a percentage of flight time or planned fuel burn (varying by different regulators), can be reduced by splitting a flight plan into two different calculations: one from the departure airport to an airport that is closer than the intended destination, and another from a decision point on the route of flight to the planned destination. Each calculation requires contingency fuel over its entire distance, but each is less than the total that would be required for the entire flight to the planned destination. The actual flight must carry the greater of the contingency fuels for the two scenarios.
The optimal flight plan places the decision point in a location where the contingency fuels for the two scenarios are exactly equal; moving it in either direction increases the fuel required for one scenario or the other. While some general guidelines exist for a good location of the decision point, a flight planning system can calculate the optimal location automatically — and it can vary dramatically based on the relative locations of all the airports.

 

[Edct]

ASA has always dispatched all int. flights under domestic rules.

 

[OCP]

Redispatch in flight? Can you explain that one?

A dumbed down version is used a lot from LAX to SYD. You fill the AC with enough fuel to get from LAX to SYD as planned, but you only actually dispatch the AC from LAX to HNL (or another long runway that is along the way). Once the AC reached a defined point the fuel and planning are rechecked. If the plan from that point allows for enough fuel to be legal, the flight is re-dispatched from that location to the final destination of SYD. If not then it "continues" to its original destination to refuel and then continue to SYD.

 

[OCP]

ASA has always dispatched all int. flights under domestic rules.

Right... Also ASA gets an international override on their per diem... Oh except in the domestic market of Canada and Mexico.