Often asked: When Is An Alternate Airport Required?

When can an airport be used as an alternate?

Simply put, you always need to file an alternate airport unless Weather reports and forecasts indicate that from 1 hour before to 1 hour after your ETA (at the listed destination) the ceiling will be at least 2,000′ AGL and the visibility will be at least 3 SM.

When an alternate airport is required What are the weather minimums that must be forecast?

3 Answers. FAR 91.169 states that IFR flight plans must include an alternate airport unless the weather is at least 2000 ft ceiling and 3 miles visibility, from one hour before to one hour afterwards (1-2-3 rule).

What are the standard alternate minimums?

The standard minimum weather requirement for an alternate is 600-2 if there’s a precision approach available and an 800-2 for a non-precision approach. (Note that the visibility requirement is the same.

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How far away should an alternate airport be?

From one hour before until one hour after the aircraft’s estimated time of arrival, the destination forecast must call for a ceiling of at least 2,000 feet and a visibility of at least three statute miles. Anything less requires an alternate. But not every airport can serve as an IFR alternate.

Where do I find alternate minimums?

To view the non-standard IFR alternate minimums information, you will need to go to the Airports page > search for the airport > on the Procedures sub-tab, tap on Arrival > and then look for the Alternate minimums line. If there is an entry, tap on it and swipe through the pages until you find the airport in question.

What is a take off alternate?

A Takeoff alternate is an aerodrome at which an aircraft would be able to land should this become necessary shortly after takeoff and it is not possible to use the aerodrome of departure.

What minimum equipment is required for IFR flight?

In the United States, instruments required for IFR flight in addition to those that are required for VFR flight are: heading indicator, sensitive altimeter adjustable for barometric pressure, clock with a sweep-second pointer or digital equivalent, attitude indicator, radios and suitable avionics for the route to be

What is the 123 rule?

The Mariner’s 1-2-3 rule, also referred to as the Danger Rule, is an important guideline mariners follow to keep out of a tropical storm or hurricane’s path. It refers to the rounded long-term National Hurricane Center (NHC) forecast errors of 100-200-300 nautical miles at 24-48-72 hours, respectively.

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What are the minimum fuel requirements in IFR conditions if the first airport?

What are the minimum fuel requirements for airplanes in IFR conditions, if the first airport of intended landing is forecast to have a 1,500 foot ceiling and 3 miles visibility at flight-planned ETA? Fuel to fly to the first airport of intended landing, A) and fly thereafter for 45 minutes at normal cruising speed.

What are non standard alternate minimums?

Nonstandard alternate ceilings and/or visibilities are published for an approach whenever the no-light approach minimums (using the local altimeter setting) exceed the standard alternate minimums. This makes sense—you wouldn’t want the alternate minimums to lure you to an approach that was below its approach minimums.

When can you descend below minimums?

If you can see the white approach light system and nothing else, you can descend down to 100′ above touchdown zone elevation, regardless of the type of approach you‘re flying (even if it’s a non-precision approach). But at the 100′ point, you need other visual references to descend lower.

What does alternate minimums not authorized mean?

NA – means alternate minimums are not authorized due to unmonitored facility, absence of weather reporting service, or lack of adequate navigation coverage. Civil pilots see FAR 91. Pilots must review the IFR Alternate Minimums Notes for alternate airfield suitability.

How do I choose an alternate airport?

When selecting an alternate, head straight for the approach plates for that airport.

  1. Look for approaches that you can fly. If you find some…
  2. Determine if they are authorized for use as an alternate, and if they are…
  3. Check to see if the weather meets the appropriate alternate minimums for that approach.
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What are the alternate minimums for an airport with a precision approach procedure?

Standard alternate minimums for a precision approach are a 600-foot ceiling and 2 SM visibility. For a non-precision approach, the minimums are an 800-foot ceiling and 2 SM visibility. Standard alternate minimums apply unless higher alternate minimums are listed for an airport.

What are IFR weather minimums?

Step 1 – Review Weather Minimums. The regulations define weather flight conditions for visual flight rules (VFR) and instrument flight rules (IFR) in terms of specific values for ceiling and visibility. IFR means a ceiling less than 1,000 feet AGL and/or visibility less than three miles.

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