ETPs

April 1, 2026

4.3+

Warning: The Scott Plot ETP tool is not a substitute for ETPs included in a crew's operational flight plan. Manual or app-generated ETPs compute time only and do not account for specific aircraft performance (e.g., drift down, depressurization, fuel burn, or descent profiles). This tool should be used only when flight plan-derived, computer-generated ETPs with full performance data are unavailable or no longer applicable to the route. It is the user's responsibility to ensure all necessary parameters are considered when performing any manual or app-based ETP calculations.

By Lat/Long From FLT PLN

Edit already-constructed ETPs and create new ETPs manually.

  • From the Red Toolbox menu select ETPs,
  • Then select By Lat/Long from FLT PLN.
  • Your ETP cards and flight plan will appear.
  • Tap Edit on the ETP card you wish to edit. You can add or edit ETPs once editing is enabled.

Add New ETP

  • Tap Add New to add a new ETP card
  • Enter the return and continue airports and select them from the list
  • Type the lat/long
  • Tap the ETP type from the menu
  • If desired, alter the ETP description
  • Tap Done to add the ETP

Edit an ETP

  • Tap Edit on the ETP card you wish to change
  • Tap Clear to clear the information
  • Tap the trash can to delete the ETP
  • Tap Done and verify ETPs are depicted correctly
  • If ETPs are correct, select Continue; if not, select Edit to adjust an ETP
Note: If you don't see your ETPs on the chart, select the layers icon and turn on the ETPs layer. You can open your flight plan by selecting the Flight Plan icon at the top right.

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Calculate New ETP

The app can auto-calculate ETPs after wind and true airspeed information is entered:

  • Enter the Return airport
  • Enter the Continue airport
  • Select the ETP type
  • Label the ETP, then tap Next
  • Zoom out to see two red lines on the chart.
  • Enter the wind direction, wind speed (3 digits), and true airspeed that applies to the red line pointing to the return alternate;
  • Do the same for the red line pointing to the continue alternate
  • Select Post
  • Verify the ETP on the chart and tap Accept if satisfactory or Edit to make adjustments
  • After accepting, you can either build another ETP or tap Finish

After an Equal Time Point has been built and posted on the chart, tap it on the chart to display information relevant to the ETP. Tapping either the Return or Continue airport from this view will bring up the airport weather conditions. You can remove the checkmark from the checkbox to remove the ETP from the chart; to add it back, go to Red Toolbox > ETPs > By Lat/Long From FLT PLN and check the box beside the desired ETP.

Note: Tapping an ETP on the chart shows ETE, DIST, and MAG CRS. These values are estimates for situational awareness only and are continuously updated based on the aircraft's great circle distance and current ground speed. If no GPS signal is available, ETE, DIST, and MAG CRS will show unavailable.

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