JO 7110.65S 2/14/08
5-14-2 Automation- En Route
5-14-3. COMPUTER ENTRY OF ASSIGNED
ALTITUDE
The data block shall always reflect the current status
of the aircraft unless otherwise specified in a facility
directive. Whenever an aircraft is cleared to maintain
an altitude different from that in the flight plan
database, enter into the computer one of the
following:
NOTEA
facility directive may be published deleting the interim
altitude computer entry requirements of subpara b. The
directive would apply to those conditions where heavy
traffic or sector complexity preclude meeting these entry
requirements.
REFERENCEFAAO
JO 7210.3, Para 8-2-7, Waiver to Interim Altitude
Requirements.
a. The new assigned altitude if the aircraft will
(climb or descend to and) maintain the new altitude,
or
b. An interim altitude if the aircraft will (climb or
descend to and) maintain the new altitude for a short
period of time and subsequently be recleared to the
altitude in the flight plan database or a new altitude or
a new interim altitude.
NOTEUse
of the interim altitude function will ensure that the data
block reflects the actual status of the aircraft and eliminate
superfluous altitude updates.
5-14-4. ENTRY OF REPORTED ALTITUDE
Whenever Mode C altitude information is either not
available or is unreliable, enter reported altitudes into
the computer as follows:
NOTEAltitude
updates are required to assure maximum accuracy
in applying slant range correction formulas.
a. When an aircraft reaches the assigned altitude.
b. When an aircraft at an assigned altitude is issued
a clearance to climb or descend.
c. A minimum of each 10,000 feet during climb to
or descent from FL 180 and above.
5-14-5. SELECTED ALTITUDE LIMITS
The display of Mode C targets and limited data blocks
is necessary for application of Merging Target
Procedures. Sectors shall ensure the display of
ModeC targets and data blocks by entering
appropriate altitude limits and display filters to
include, as a minimum, the altitude stratum of the
sector plus:
a. 1,200 feet above the highest and below the
lowest altitude or flight level of the sector where
1,000 feet vertical separation is applicable; and
b. 2,200 feet above the highest and below the
lowest flight level of the sector where 2,000 feet
vertical separation is applicable.
NOTE-
1. The data block, for purposes of this paragraph, must
contain the beacon code and Mode C altitude at a
minimum.
2. Exception to these requirements may be authorized for
specific altitudes in certain ARTCC sectors if defined in
appropriate facility directives and approved by the
EnRoute and Oceanic Operations Area Director.
REFERENCEFAAO
JO 7110.65, Para 5-1-2, Alignment Accuracy Check.
5-14-6. SECTOR ELIGIBILITY
The use of the OK function is allowed to override
sector eligibility only when one of the following
conditions is met:
a. Prior coordination is effected.
b. The flight is within the control jurisdiction of
the sector.
5-14-7. COAST TRACKS
Do not use coast tracks in the application of either
radar or nonradar separation criteria.
5-14-8. CONTROLLER INITIATED COAST
TRACKS
a. Initiate coast tracks only in Flight Plan Aided
Tracking (FLAT) mode, except “free” coast tracking
may be used as a reminder that aircraft without
corresponding computer‐stored flight plan information
are under your control.
NOTE-
1. To ensure tracks are started in FLAT mode, perform a
start track function at the aircraft's most current reported
position, then immediately “force” the track into coast
tracking by performing another start function with “CT”
option in field 64. Making amendments to the stored route
with trackball entry when the aircraft is rerouted, and
repositioning the data block to coincide with the aircraft's
2/14/08 JO 7110.65S
Automation- En Route 5-14-3
position reports are methods of maintaining a coast track
in FLAT mode.
2. DARC does not have the capability to initiate coast
tracks.
b. Prior to initiating a coast track, ensure the
following:
1. A departure message or progress report
corresponding with the aircraft's current position is
entered into the computer.
2. The track being started is within the Posted
Time Update Interval (PTUI) of the aircraft's
computer‐estimated position and the Flight Plan
Track Position Difference (FTPD) distance of the
aircraft's flight plan route.
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