Order 7110.65P, Air Traffic Control, with changes

7110.65P CHG 2 2/17/055−4−11. EN ROUTE FOURTH LINE DATA BLOCKUSAGEa. The en route fourth line data block shall be usedto forward only the specified control informationlisted below. Any additional control information shallbe forwarded via other communication methods. Enroute fourth line data block free text area may be usedby individual sector teams for recording anyadditional information the team deems appropriatefor managing the sector, but shall be removed prior toinitiation of identification transfer.REFERENCE−FAAO 7110.65, Transferring Controller Handoff, Para 5−4−5b.b. The en route fourth line data block area shall beused for coordination purposes only in associationwith radar identified aircraft.c. When automated information transfer (AIT)procedures are applied, en route fourth line usage fortransfer of control information shall be specificallydefined within facility AIT directive.REFERENCE−FAAO 7110.65, Automated Information Transfer (AIT), Para 5−4−8.FAAO 7210.3, Automated Information Transfer (AIT), Para 4−3−8.d. Coordination format for assigned headingsshall use the designation character “H” preceding athree−digit number.EXAMPLE−H080, H270e. Aircraft assigned a heading until receiving a fixor joining a published route shall be designated withassigned heading format followed by the fix or route.EXAMPLE−H080/ALB, 080/J121, PH/ALBNOTE−1. The notation “PH” may be used to denote presentheading.2. The character “H” may be omitted as a prefix to theheading assignment only if necessary due to character fieldlimitations, and it does not impede understanding.f. Aircraft authorized specific weather deviationor lateral weather deviation until able to proceeddirect to a fix shall be designated with the identifiedcharacters: D−deviation, L−left, R−right, N−north,E−east, S−south, W−west.EXAMPLE−DN, D20L, DR/ATL, D30R/ATLg. Coordination format for assigned airspeedsshall use the designation character “S” preceding athree−digit number.NOTE−A “+” notation may be added to denote an assigned speedat or greater than the displayed value. A “−” notation maybe added to denote an assigned speed at or less than thedisplayed value.EXAMPLE−S210, S250, S250+, S280−h. Aircraft assigned a Mach number shall use thedesignation “M” preceding the two−digit assignedvalue.EXAMPLE−M80, M80+, M80−REFERENCE−FAAO 7110.65, En Route Fourth Line Data Block Usage,Para 5−4−1gNOTE.i. Aircraft authorized to conduct celestial navigationtraining within 30 NM of the route centerlinespecified within the en route clearance.EXAMPLE−CELNAVj. Coordination format for aircraft requesting analtitude change shall use the designation characters“RQ” preceding a three−digit number.EXAMPLE−RQ170, RQ410k. Coordination format for aircraft requesting aroute change shall use the designation “RQ/”preceding a specific fix identifier.EXAMPLE−RQ/LAX, RQ/NEUTOl. The acceptance of a handoff by the receivingcontroller shall constitute approval of the informationcontained within the en route fourth line data block.It is the responsibility of the receiving controller toadvise the transferring controller if any informationis not understood, or needs to be revised.NOTE−Due to system and character limitations the usage of thesestandardized entries may require additional support viafacility directive in order to provide complete coordination.m. All other control information shall becoordinated via other methods.5−4−6Transfer of Radar Identification