GPS Receiver User Manual

6.2.2. GENERAL PROCEDURE FOR NON-PRECISION
APPROACHES
Non-precision approaches will all have the general flow of events as fol-
lows. Refer to figure 6-5.
1. Select and load the approach into the active flight plan.
Approaches are always conducted from FPL 0. The approach can be
loaded at almost any time but must be completed before reaching the
Final Approach Fix and should be done as soon as possible. This
corresponds to point A in figure 6-5. If the aircraft is greater than 30
NM from the airport, then the CDI scale factor will remain at the
default ±5 NM full scale deflection. Only one approach can be loaded
in FPL 0.
Chapter 6 Approaches and DP/STARs
6-4
17
35
1
4
3
2
MAP
FAF
IAF
ARP
Approach Arm
CDI Scale Factor
±1.0 nm
CDI Scale Factor
±5.0 nm
CDI Scale Factor
constant at ±0.3 nm
CDI Scale Factor
changing from
±1.0 nm to ±0.3 nm
70°
30 nm
2 nm
Transition to approach
ACTV if:
- LEG mode is selected
- Integrity checks OK
- Aircraft heading
towards the FAF
- FAF or co-located
IAF/FAF is active
waypoint
Load approach
into flight plan
Approach automatically
arms when within 30 nm
of the airport and an
approach is loaded into
the active flight plan
FAF - Final Approach Fix
MAP - Missed Approach Point
ARP - Airport Reference Point
IAF - Initial Approach Fix
MAHP -Missed Approach Holding
Point
N
O
T
T
O
S
C
A
L
E
N
O
T
F
O
R
N
A
V
I
G
AT
I
O
N
(A)
(B)
(C)
(D)
(E)
MAHP
(F)
Automatic Waypoint
sequencing stops
Figure 6-5