JO 7110.65 — Air Traffic Control
JO 7110.65 5-4-10
EN ROUTE FOURTH LINE DATA BLOCK USAGE
The fourth line of the data block must be displayed. When using the fourth line for forwarding control information, only messages specified in this section, a facility directive or LOA are authorized. Any additional control information must be forwarded via other communications methods. Free text may be used by individual sector teams for recording information the team deems appropriate for managing the sector, but must be removed prior to initiation of identification transfer. REFERENCE-
FAA Order JO 7110.65, Para 5-4-5 , Transferring Controller Handoff, Subpara b .
FAA Order JO 7110.65, Para 5-4-8 , Automated Information Transfer (AIT).
The en route fourth line data block area must be used for coordination purposes only in association with radar identified aircraft.
When automated information transfer (AIT) procedures are applied, en route fourth line usage for transfer of control information must be specifically defined within facility AIT directive. REFERENCE-
FAA Order JO 7110.65, Para 5-4-8 , Automated Information Transfer (AIT).
FAA Order JO 7210.3, Para 4-3-10, Automated Information Transfer (AIT).
Coordination format for assigned headings must use the designation character “H” preceding a three-digit number. EXAMPLE-
H080, H270
Aircraft assigned a heading until receiving a fix or joining a published route must be designated with assigned heading format followed by the fix or route. NOTE-
The notation “PH” may be used to denote present heading.
The character “H” may be omitted as a prefix to the heading assignment only if necessary due to character field limitations, and it does not impede understanding.
EXAMPLE-
H080/ALB, 080/J121, PH/ALB
Coordination format for weather deviations must use the designated characters:
D-deviation
L-left
R-right
N-north
E-east
S-south
W-west
/F-direct next NAVAID/waypoint in the flight plan
D(heading)-(heading)–deviate between two specified headings. NOTE-
Two digits specify turns in degrees and must include direction character(s). Three digits specify heading(s).
The inclusion of /(NAVAID) or /(waypoint), when preceded by the designated characters for weather deviations, indicates that a pilot has been authorized to deviate for weather and rejoin the route at the specified NAVAID or waypoint. The use of /F, following the designated weather deviation characters, indicates that a pilot has been authorized to deviate and rejoin the route of flight at the next fix in the route in accordance with paragraph 2-6-4 .
EXAMPLE-
D90L/ATL, DL/KD75U, D090/F
NOTE-
The absence of /NAVAID, /waypoint, or /F after the weather deviation designated characters indicates that the pilot has been authorized to deviate for weather, and the receiving controller must provide a clearance to rejoin the route of flight in accordance with subparagraph 2-1-15 c .
EXAMPLE-
DN, D20L, D30R, D180-210
Coordination format for specific assigned airspeeds must use the designation character “S” preceding a three‐digit number. A three-digit number followed by a “+” must be used to denote an assigned speed at or greater than the displayed value, or followed by a “-” to denote an assigned speed at or less than the displayed value. EXAMPLE-
S210, 250+, 280-
Aircraft assigned a Mach number must use the designation “M”, “M.”, or “.” preceding the two‐digit assigned value. The displayed Mach number must also be followed by a “+” to denote an assigned speed at or greater than the displayed value, or a “-” to denote an assigned speed at or less than the displayed value. EXAMPLE-
M80, M80+, M80-, M.80, .80, .80-
Coordination format for aircraft authorized to conduct celestial navigation training within 30 NM of the route centerline specified within the en route clearance must use “CELNAV.”
Coordination format for aircraft requesting an altitude change must use the designation characters “RQ” preceding a three‐digit number. EXAMPLE-
RQ170, RQ410
Coordination format for aircraft requesting a route change must use the designation “RQ/” preceding a specific fix identifier. EXAMPLE-
RQ/LAX, RQ/NEUTO
The acceptance of a handoff by the receiving controller must constitute receipt of the information contained within the en route fourth line data block.This information must not be modified outside of the controller's area of jurisdiction unless verbally coordinated or specified in a Letter of Agreement or Facility Directive. It is the responsibility of the receiving controller to advise the transferring controller if any information is not understood, or needs to be revised. NOTE-
Due to system and character limitations the usage of these standardized entries may require additional support via facility directive in order to provide complete coordination.
All other control information must be coordinated via other methods.
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Chapter 5. Radar 7110.65BB
7110.65 by Chapter Number Chapter 0. General Information Chapter 1. General Chapter 2. General Control Chapter 3. Airport Traffic Control - Terminal Chapter 4. IFR Chapter 5. Radar Chapter 6. Nonradar Chapter 7. Visual Chapter 8. Offshore/Oceanic Procedures Chapter 9. Special Flights Chapter 10. Emergencies Chapter 11. Traffic Management Procedures Chapter 12. Canadian Airspace Procedures Chapter 13. Decision Support Tools Chapter 14. Data Link Communications Appendix A Appendix B
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JO 7110.65BB by Topic
General Information Explanation of Changes
General Introduction
Terms of Reference
General Control General
Flight Plans and Control Information
Flight Progress Strips
Radio and Interphone Communications
Route and NAVAID Description
Weather Information
Altimeter Settings
Runway Visibility Reporting- Terminal
Automatic Terminal Information Service Procedures
Team Position Responsibilities
Airport Traffic Control - Terminal General
Visual Signals
Airport Conditions
Airport Lighting
Runway Selection
Airport Surface Detection Procedures
Taxi and Ground Movement Procedures
Spacing and Sequencing
Departure Procedures and Separation
Arrival Procedures and Separation
Helicopter Operations
Sea Lane Operations
IFR NAVAID Use Limitations
Clearances
Departure Procedures
Route Assignment
Altitude Assignment and Verification
Holding Aircraft
Arrival Procedures
Approach Clearance Procedures
Radar General
Beacon/ADS-B Systems
Radar Identification
Transfer of Radar Identification
Radar Separation
Vectoring
Speed Adjustment
Radar Departures
Radar Arrivals
Radar Approaches- Terminal
Surveillance Approaches- Terminal
PAR Approaches- Terminal
Automation- En Route
Standard Terminal Automation Replacement System (STARS)-Terminal
Nonradar General
Initial Separation of Successive Departing Aircraft
Initial Separation of Departing and Arriving Aircraft
Longitudinal Separation
Lateral Separation
Vertical Separation
Timed Approaches
Visual General
Visual Separation
VFR‐On‐Top
Approaches
Special VFR (SVFR)
Basic Radar Service to VFR Aircraft- Terminal
Terminal Radar Service Area (TRSA)-Terminal
Class C Service- Terminal
Class B Service Area- Terminal
Offshore/Oceanic Procedures General
Coordination
Longitudinal Separation
Lateral Separation
Offshore/Oceanic Transition Procedures
Separation from Airspace Reservations
North Atlantic ICAO Region
Caribbean ICAO Region
Pacific ICAO Region
North American ICAO Region
Special Flights General
Special Operations
Special Use, ATC-Assigned Airspace, and Stationary ALTRVs
Fuel Dumping
Jettisoning of External Stores
Unmanned Free Balloons
Parachute Operations
Unidentified Anomalous Phenomena (UAP) Reports
Emergencies General
Emergency Assistance
Overdue Aircraft
Control Actions
Miscellaneous Operations
Oceanic Emergency Procedures
Ground Missile Emergencies
Traffic Management Procedures General
Canadian Airspace Procedures General Control
Decision Support Tools ERAM - En Route
ATOP - Oceanic
Data Link Communications Terminal Procedures for Issuing Automated Clearances
En Route Controller Pilot Data Link Communications (CPDLC) - Domestic
Advanced Technologies and Oceanic Procedures (ATOP) - Oceanic Controller Pilot Data Link Communications (CPDLC)
Appendix A
Appendix B
Radar
Radar Separation
Chapter 5. Radar
Section 5. Radar Separation
Retrieved from ecfr.gov on July 20, 2026.