OPERATOR’S
MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
Page
10-8
November 19, 2009
HOLDING PATTERN GEOMETRY
The initial geometry of the holding pattern is computed on the first fly-over of the holding fix, based on current
TAS and computed wind, and at a bank angle for a rate one (1) turn, or not exceeding the maximum configured
roll, whichever is less. The size of the holding pattern is compared to the dimensions of the protected airspace,
less a small buffer, defined by ICAO for the maximum holding speed (see Table10-1) and maximum wind for
that altitude. On each subsequent fly-over of the holding fix the holding pattern geometry is recomputed using
the current TAS and wind.
If the combination of actual holding speed and wind will cause the ICAO holding pattern protected airspace to be
exceeded, the alert message HIGH HOLDING SPEED is generated one (1) minute prior to reaching the holding
fix on entry, and on each subsequent fly-over of the fix.
NOTE: When buffet protection is configured, the CMA-9000 FMS removes the buffet limit during a hold to ensure
that the bank angle limit does not cause an increase in the holding pattern area.
Aircraft Type
Altitude (feet)
Maximum IAS (knots)
Fixed wing, slow
Fixed wing, fast
(Aerobatic)
Helicopter
0-14,000
0-14,000
14,000-20,000
20,000-34,000
34,000 and above
0-6,000
6,000-14,000
170
230
240
265
0.83 Mach
100
170
Table 10-1 ICAO Maximum Holding Speeds
NOTE: The holding pattern geometry provides parallel inbound and outbound legs.
HOLDING PATTERN AT A ROUTE WAYPOINT
With any ACT LEGS page displayed:
Press HOLD,
the ACT RTE x LEGS 1/X page is displayed with "/H" in the scratchpad.
or:
Display the DES+SAR or TACTICAL 1/2 or INACT DES+SAR or TACTICAL 2/2 page, and select "HOLD" by
pressing [INIT REF], <DES+SAR> or <TACTICAL> (LSK 6R) and <HOLD> (LSK 3R).
NOTE: The holding pattern can also be inserted in the inactive route by pressing [INIT REF], <DES+SAR> or
<TACTICAL> (LSK 6R), [NEXT] (for the INACT DES+SAR or TACTICAL 2/2) and <HOLD> (LSK 3R).
The inactive RTE y LEGS 1/X page is displayed with "/H" in the scratchpad.
This page is printed under user's responsibility
and must not be retained for reference