Heading Systems; Selected Intercept Angle; Approach; Reverse - Century 4000 Pilots Operating Manual

HEADING SYSTEMS

In systems equipped with a DG the autopilot heading bug must be set to match the selected VOR/LOC
course when in NAV, APR, or REV modes. For loran or GPS tracking, set the heading bug to the
"desired bearing" information.
In systems equipped with and NSD-360A, NSD-1000 or other HSI instrument, the heading bug is
disabled when in the NAV, APR, or REV modes. In these modes the azimuth information to the autopilot
is provided by the radio course pointer.
NOTES
In systems equipped with an NSD-360A, NSD-1000 or other HSI always set the radio course pointer to
the Front Course Inbound Heading when operating in the APR or REV modes.
In systems equipped with a DG, during an instrument approach, the heading bug must be set to match
course for the segment of the approach being flown when using the NAV, APR, or REV modes.
See section on operating techniques for additional operating instructions for the NSD-360A, NSD-1000
and the DG.

SELECTED INTERCEPT ANGLE

In systems equipped with a NSD-360A, NSD-1000 or other HSI, a selected
intercept angle function is available while operating in the NAV, APR, and REV
modes.
Selected angle intercepts are initiated by performing the following steps:
1. While operating in the HDG mode, set the course pointer to the desired radial.
2. Set the heading bug on the NSD to the desired intercept heading.
3. Press the HDG and NAV, HDG and APR or HDG and REV mode buttons
simultaneously.
Both HDG and the selected lateral mode will now illuminate on the annunciator. As the aircraft begins its
on-course turn, the HDG annunciator will extinguish indicating that the system has captured the selected
radio course and is now receiving azimuth input from the radio course pointer.
NOTE
If valid radio signal is lost after initiating a selected angle intercept, the applicable navigation mode
annunciator will flash and the autopilot will remain in the HDG mode.
APPROACH - The APR mode provides an automatic 45-degree VOR-LOC intercept
angle and selected angle intercepts when the system is equipped with an NSD-360A,
NSD-1000 or other HSI.
The intercept, crosswind, and tracking sequences are similar to those described in the NAV mode of
operation except that 70 seconds after the on-course turn the bank angles are reduced to 12 degrees.
*The APR mode has additional enabling logic for the automatic glideslope arm, capture, and track
sequence and must be used on ILS approaches.
REVERSE (Back Course) - The REV mode is for use in tracking the localizer back
course Inbound and front course Outbound or VOR course Outbound.
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