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current descent to provide adequate separation.
Corrective RA “Descend, Descend Now
Descend, Descend Now”
Follows a CLIMB advisory to indicate a change in vertical
direction is needed. Initiate an immediate descent from the
current climb to provide adequate separation.
RA Communication and Coordination
In a case where both aircraft are TCAS equipped, the TCAS communicates with the other
aircraft to coordinate evasive strategies. This coordination may occur before an advisory is
issued, and is calculated for optimum safe separation using the least disruptive maneuver
possible. For example, if one aircraft is in a particular vertical speed (VS) profile, it may be
advantageous for that aircraft to increase or decrease its VS, as opposed to the other
assuming an evasive VS. Whatever maneuver is selected, this information is communicated to
other aircraft and ground facilities.
If the other aircraft is not TCAS equipped, the corrective or preventive maneuver responsibility
is assumed by the TCAS-equipped aircraft, and only the ground facility communication is
possible.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−69
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
TRAFFIC ALERT AND COLLISION AVOIDANCE SYSTEM (TCAS) (CONT'D)
TCAS Vertical Speed Advisories
Figure 17−10−67
Navigation Display TCAS Indications
Figure 17−10−68
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−70
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
TRAFFIC ALERT AND COLLISION AVOIDANCE SYSTEM (TCAS) (CONT'D)
TCAS Resolution Advisory (RA) Inhibits
TCAS RAs and some aural alerts are inhibited below certain radio altitudes. Radio altitudes and
the associated RA status are as follows:
TCAS RA Inhibits (Limits)
ADVISORY OR MODE LIMITS
Increase Descent RA Prevented below 1,550 feet AGL during a climb and
1,450 feet AGL during a descent.
Descend RA Prevented below 1,000 feet AGL during a descent and
1,200 feet AGL during a climb.
Resolution Advisories (RAs) Prevented below 1,100 feet AGL during a climb and
900 feet AGL during a descent (TCAS automatically
changes to the TA or TA ONLY mode).
Self-Test
The TCAS self-test is initiated from the ATC/TCAS control page by pushing the TEST line select
key, or selecting TEST in the MFD/TCAS tuning window. The following indications should be
displayed during the test:
• TCAS TEST is presented on the TCAS mode line of the PFD/MFD navigation display.
• Each PFD displays flashing red TRAFFIC right of the heading and vertical traffic resolution
cue on the VSI (red/green).
• TCAS format traffic display shows the TCAS self-test pictorial representation. The display
shows four intruder symbols.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−71
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
TRAFFIC ALERT AND COLLISION AVOIDANCE SYSTEM (TCAS) (CONT'D)
TCAS Test Indications
Figure 17−10−69
GLOBAL POSITIONING SYSTEM (GPS)
Description
The GPS is a space-based navigation system that provides highly accurate three-dimensional
position, velocity and time information to ground or aircraft receivers.
The GPS is a sensor used by the flight management system to compute an accurate position. All
GPS data is accessed through the FMS CDU.
The GPS has three main segments:
• Space segment;
• Control segment (ground); and
• User segment.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−72
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
GLOBAL POSITIONING SYSTEM (GPS) (CONT'D)
Space Segment
The space segment of the GPS is made up of 24 NAVSTAR satellites. There are 21
operational satellites at all times, and three are spares. The satellites:
• Are in a 10,900-mile-high orbit;
• Are in six orbital planes, with four satellites in each plane;
• Have a 12-hour orbit;
• Are spaced to provide a minimum of 4 satellites in view at all times; and
• Have atomic clocks, and transmit on two coded frequencies.
Control Segment
The control segment monitors the space segment, and adjusts the orbits when operationally
required. It includes five ground stations around the world. One is the master control station
and the others are monitor stations.
The monitor stations passively track all satellites in view and acquire range data from them.
This data is forwarded to the master control station. The master control station uses the data
　
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