What is the 123 rule for alternate airports?
What is the 123 rule for alternate airports? It's called the 3-2-1 rule, and it's the easiest way to remember the regulation. To recap, if the weather at your destination isn't at least 3 SM of visibility and 2000' AGL ceilings from 1 hour before to 1 hour after your ETA, you need to file an alternate.
Can I use GPS approach at alternate?
The point of the special rules using GPS as an alternate has to do with the fact that non-WAAS GPS is supplementary navigation. So you can file with the destination or the alternate having only a GPS approach, but not both. WAAS-equipped aircraft can file for destinations and alternates having only GPS approaches.
What is the 123 rule for alternates?
It's called the 3-2-1 rule, and it's the easiest way to remember the regulation. To recap, if the weather at your destination isn't at least 3 SM of visibility and 2000' AGL ceilings from 1 hour before to 1 hour after your ETA, you need to file an alternate.
What is an example of exemption 3585?
For example, the main body of the forecast may have the visibility at one-half mile, but a TEMPO phrase may show a possible drop to on-quarter mile at the ETA. When this happens, the airlines that have been granted approval to do so can use what is called Exemption 3585.
Is a destination alternate always required?
Almost all flights require Destination Alternates but Take-off and En-route alternates are only required in specific circumstances and the departure aerodrome may also be an en-route or destination alternate for the same flight.
What is the exemption for alternate airport?
Exemption 3585 allows the dispatcher to release a flight to an airport OR alternate when the TAF indicates, through the conditional statements (TEMPO, PROB, BECMG) that the weather could be below authorized landing minimums at the estimated time of arrival.
What is exemption 17347?
Explain the purpose of Exemption 17347? It allows a 121 flight to be dispatched to a destination airport or alternate when the TAF is forecasting below authorized weather minimums at the ETA. [The remarks section of the TAF can forecast weather below authorized weather mins at ETA, eg TEMPO, BECMG,PROB.
How far away can an alternate airport be?
Not more than one hour from the departure airport at normal cruising speed in still air with one engine inoperative. (2) Aircraft having three or more engines. Not more than two hours from the departure airport at normal cruising speed in still air with one engine inoperative.
What is the airport 3-1-1 rule?
You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.
What is the YFR flight rule?
YFR means the flight initially will be operated under IFR, followed by one or more changes of flight rules. ZFR means the flight initially will be operated under VFR, followed by one or more changes of flight rules.
Does ATC know your alternate?
ATC receives only your filed destination, not the alternate. This is why ATC has to ask where a pilot wants to divert. To give ATC a heads up on where you want to go, you can write it in the remarks section, which is transmitted to ATC.
What is the alternate airport rule?
If either the ceiling or visibility is forecast to be less than 2,000 feet or 3 statute miles during that arrival window, you are required to file an alternate. Also, the destination airport must have at least one instrument approach procedure or an alternate airport will always be required.
How close can you fly to another aircraft?
What is the distance for flying aircraft set by the regulations? Commercial aircraft flying below 29,000 feet must maintain a vertical separation of 1,000 feet. Any higher and the separation increases to 2,000 feet, except in airspace where Reduced Vertical Separation Minimum (RVSM) applies.