Contents
What is the 60 minute rule?
ETOPS History In 1953, the FAA imposed what is known as the “60-minute rule” on two- and three-engine airplanes, disallowing them to fly more than 60 minutes outside the closest airport. In 1988, the flight time was extended to a 180-minute maximum.
What is EDTO entry point?
3.3 EDTO Entry Point. The first point on the route of an EDTO flight; determined using a one-engine inoperative cruise speed under standard conditions in still air that is more than the threshold from an enroute alternate airport for airplanes with two engines and more than two engines.
When calculating your magnetic heading what must be taken into consideration?
However, flying this course off the magnetic compass would not provide an accurate course between the two points due to three elements that must be considered. The first is magnetic variation, the second is compass deviation, and the third is wind correction. All three must be considered for accurate navigation.
What is etops critical point?
The Critical Point (CP), or Equal Time Point (ETP), is when an aircraft is the same flying time from 2 potential en-route diversions. Calculation of appropriate CPs aids decision making when deciding courses of action following a significant event such as an engine failure or on-board medical emergency.
Are ATC headings true or magnetic?
When given a heading by ATC, is it magnetic, true, or something else? Whenever you are working with an air traffic control facility, any radar vectors they give you will be turns to magnetic headings only. This simplifies things, both on the ground and in the air, and means you don’t have to do math in the cockpit.
How do you calculate ETOPS?
For example, a selected one-engine inoperative cruise speed of 400 knots will result in an ETOPS area of applicability of 1200 NM (ie. 400 knots x 3 hours= 1200 NM). Any flight whose route will take the airplane more than 1200 NM from an adequate airport would require the certificate holder to have ETOPS authorization.
How long is the diversion time for ETOPS?
While ETOPS advocated for a 60 minute threshold diversion time, EDTO has pushed the threshold to 90 minutes, 180 minutes and even 240 minutes. Further, the range circles in ETDO are higher than those within ETOPS covering extra number of nautical miles.
What is extended diversion time operations ( EDTO )?
Extended Diversion Time Operations (EDTO) guidelines have positively affected the growth of aviation industry as compared to their previous form recognized as Extended-range Twin –engine Operations (ETOPS) guidelines that just covered to engine aircrafts.
How are diversion curves used in traffic assignment?
Diversion curve is the basic approach used for the traffic assignment purposes. The method is similar to the mode choice curve. Traffic between two routes can be computed as a function of relative cost or travel time. Show the diversion curve based on the travel time ratio in the figure below.
How to determine the angle of a diversion curve?
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