Close-in Obstacles
How EFB Pro Calculates Re-calculates for Close-in
Obstacles
Close-in Obstacles
(2nd Segment Climb Compensation)
• AIM 5-2-8 b.4. Close-in Obstacles
• Obstacles w/in1 NM of the Departure End of the Runway
(DER) and penetrate the 40:1 Obstacle Identification Surface
OIS are referred to as “low, close-in obstacles.”
• The EFB Pro climb page offers a solution to 135.379 which
imposes a requirement to consider OEI performance on
aircraft over 19,000# and turbojets.
• While we are not required in our operation to make this
selection, it may be a good idea depending on your
departure airport.
Close-in Obstacles
• KLYH
• ODP on airport
diagram
Close-in Obstacles
EXAMPLE:
Lynchburg LIBRT 3
Departure Procedure
using EFB Pro.
Close-in-Obstacles
After selecting LYH and inserting
current weather and runway,
you’ll come to this page. Fill in
the sections circled in red then
account for obstacles as
applicable.
Note: Distance below may change
after Ft/NM and Altitude are
inserted based on temp and
aircraft performance.
Close-in Obstacles
If a Takeoff Obstacle listed
below is within 1864’ of
the DER and 300’ of the
centerline select “YES”
Close-in Obstacles
Selecting “Yes”
• Increases the “start of climb”
calculation at the end of the runway
from 35’ to 70’.
• Shortens Take-Off Run Available
(TORA) by 1-200’ which results in an
earlier climb.
• Accounts for Close-in Obstacles
If any T/O obstacle
penetrates the DER out
to 1864 w/in 300’ mark
the box “yes”
Background – Additional References
(All of these are worthy of a look if you can’t sleep)
https://www.youtube.com/watch?v=l0i9o1MGNpU
https://nbaa.org/aircraft-operations/safety/in-flight-safety/aircraft-climbperformance/one-engine-inoperative-takeoff-planning-and-climb-performance/
https://nbaa.org/aircraft-operations/safety/in-flight-safety/aircraft-climbperformance/oei-planning-theres-another-way/
https://www.youtube.com/watch?v=uaaKY3THvcU&t=2s
FAA/Industry Transport Airplane Performance Planning (TAPP) Working Group
https://www.youtube.com/watch?v=Ry-12gl2L8A&t=1s
https://www.youtube.com/watch?v=yh5_FN3Rmw0
https://www.youtube.com/watch?v=vEc_M9PqUJc
https://www.youtube.com/watch?v=wqtvb3L_NT0