II Morrow Inc. Apollo NMC, Operating Manual

Page: 258 / 367

Note
Selecting the inbound course is a very important step.
Sequencing is performed relative to the inbound
course you have selected. Once you are established
on the selected inbound course, press OBS/HLD
again to enable sequencing. The OBS/HLD light will
turn off.
Fly the procedure-turn or course reversal and intercept the selected
inbound course to the waypoint.
When established inbound, press
OBS/HLD to enable the flight plan to
sequence upon the next arrival at the
waypoint.
If you do not enable flight plan sequencing when established, the
TO/FROM flag will go to “FROM” as you cross the waypoint.
Press the
OBS/HLD button.
Sequencing will occur immediately, if
you are past the waypoint (on the
“From” side).
Procedure Turn at an FAF
A special condition occurs when a procedure turn is made at an IAF
which is also the FAF. In this case, the Apollo NMS will treat the
waypoint as the IAF until sequencing is enabled when established
inbound. When you enable sequencing by pressing the
OBS/HLD
button thereby extinguishing the OBS/HLD annunciator light, the
IAF/FAF waypoint becomes the FAF. If you are less than 2 nm from
the FAF when you enable sequencing, then transition to Approach
Active, i.e., the CDI sensitivity will begin changing to 0.3 nm
full-scale deflection immediately. The approach annunciator will
begin flashing immediately if all the conditions exist to allow the
approach to go to the active condition (RAIM available, etc.). It is
important for you to enable sequencing as soon after becoming
242
Approach Procedures Operations