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ETOPS (EDTO) Beyond 180 Minutes


ETOPS (EDTO) Beyond 180 Minutes 

How to use the ETOPS Beyond feature. 

We estimate that this will take 3 minutes to complete.

Detailed Explanation 


N-Flight Planning's current ETOPS functions met previous ETOPS direction by leveraging the calculation of a specific time/distance circle from an airport (in still air) to confirm that the route of flight remained within the approved area. More recent ETOPS regulations have focused upon time limitations of a "Time Limited System" and/or “Cargo Fire Suppression System” aboard the aircraft, rather than a specific approved time/distance.

Operations conducted in accordance with ETOPS Beyond 180 Minutes factor in actual wind and weather conditions when confirming the Time Limited System and/or Cargo Fire Suppression System time is not exceeded. N-FP will continue to draw the ETOPS Circles based upon "Still Air". However, the actual calculated Diversion Time, checked against the TLS/CFSS value, now accounts for the actual wind and weather requirements for operators conducting ETOPS Beyond 180 Minutes operations.


The following settings are needed in order to use the Beyond 180 Minutes option. Ensure they are all set appropriately for your specific scenario.

 A process follows to help you learn how to use this feature. 

NFP-2149 – ETOPS (EDTO) Beyond 180 Minutes: Airline Code Parameters (FOMS 170)

A setting is available in Airline Code Parameters for users to control their ETOPS Beyond 180 Minutes operations.
This setting controls whether a Warning or Error appears in situations where the diversion time exceeds the TLS/CFSS time. 

NFP-2149 – ETOPS (EDTO) Beyond 180 Minutes: Aircraft Characteristics (FOMS 220)

Additional fields in Aircraft Characteristics include TLS Time, CFSS Time, and a Beyond check box to enable an ETOPS scenario
for use in ETOPS Beyond 180 Minute operations. At least one scenario must have a value above 180 and be enabled for Beyond to be
used for ETOPS Beyond 180 Minute operations, and one or both of the TLS (Time Limited System) or CFSS (Cargo Fire Suppression System)
 time fields must be filled in. The maximum value for these fields is 999. 

NFP-2149 – ETOPS (EDTO) Beyond 180 Minutes: ETP Scenarios (FOMS 231)

In order to perform the ETOPS Beyond 180 Minute diversion time calculations, N-Flight Planning leverages our current ETP functionality.
The TLS/CFSS Check field allows the user to designate an ETP scenario to be used for determining compliance with the
TLS or CFSS time limits.

The ETP Policy used during flight plan calculation must include at least one scenario designated for TLS  or CFSS. You can modify an
 existing scenario or create a new one to be used for TLS or CFSS check.

NFP-2149 – ETOPS (EDTO) Beyond 180 Minutes: ETP Scenarios (FOMS 231)

In the ETP Policies options, you must create or designate a policy to include the scenarios for the TLS or CFSS check.

Policy designations are named at your discretion, but must be at least two alpha characters long. Once your policy is selected or named, add the
 scenarios you want to use from the appropriate drop down lists.

NFP-2149 – ETOPS (EDTO) Beyond 180 Minutes: Plan Screen

For you to be able to determine whether you are using an ETOPS Beyond 180 Minute scenario for your flight plan calculations,
 the ETOPS section of the Plan Screen contains an indicator label. 

NFP-2149 – ETOPS (EDTO) Beyond 180 Minutes: Functional Changes

The following conditions are required for ETOPS Beyond 180 Minutes operations:


  • The aircraft must have an ETOPS scenario (Time/Distance value) enabled for Beyond
  • The aircraft must have either TLS or CFSS time values filled in
  • At least one ETP Scenario in the ETP Policy must be designated for TLS or CFSS checks
  • Compute will error if none are designated
  • That same ETP Scenario must match which of the time values are filled in for the aircraft (that is, if the user
     only wants to perform a TLS check, the scenario must be enabled for TLS and the aircraft must have a TLS time value)
  • Compute will error if no match found
  • All ETOPS stations must be used for ETP pairs
  • Compute will error if not all stations are used
  • Depending on user setting in Airline Code Parameters, if one or both checks (TLS/CFSS) fail, the system alerts the
    user of the first  one that fails.


Now, let's plan a flight based on these settings.

Interaction 1 Click the Plan tab.


Type hint to help learners. (12pt)

Ensure your flight is selected (highlighted in green). 

Interaction 1 Click the button.

Interaction 1 Click the 180 min ... Beyond list item.

Interaction 1 Click the Flight button.

The Beyond option now shows. 

Interaction 1 Click the ETOPS check box.

Interaction 1 Click the ETP check box.

Interaction 1 Click the First ETOPS station input field.

Interaction 1 Enter NFFN into the First ETOPS station field.

Interaction 1 Click the Second ETOPS Station input field.

Interaction 1 Enter CYVR into the Second ETOPS Station field.

Interaction 1 Click the To ETP button.

Interaction 1 Click the Compute button.

Interaction 1 Please click Next to continue.

Note the ETP points are midway through the flight, far beyond the ETOPS circles. 


If you want to display ETOPS Beyond information in your flight plan, please contact NAVBLUE Support. 


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