Message intent/use Message element URG ALRT RESP
63 Instruction that at the specified time the specified position is to be crossed at the specified level and speed, and the level and speed are to be maintained. AT (time) CROSS (position) AT AND MAINTAIN (level) AT (speed) N M W/U
Note.— Wherever the variable “level” is specified, the message can specify either a single level or a vertical range, i.e. block level.
Table A5-4. Lateral offsets (uplink)
Message intent/use Message element URG ALRT RESP
64 Instruction to fly a parallel track to the cleared route at a displacement of the specified distance in the specified direction. OFFSET (specified distance) (direction) OF ROUTE N M W/U
65 Instruction to fly a parallel track to the cleared route at a displacement of the specified distance in the specified direction and commencing at the specified position. AT (position) OFFSET (specified distance) (direction) OF ROUTE N M W/U
66 Instruction to fly a parallel track to the cleared route at a displacement of the specified distance in the specified direction and commencing at the specified time. AT (time) OFFSET (specified distance) (direction) OF ROUTE N M W/U
67 Instruction that the cleared flight route is to be rejoined. PROCEED BACK ON ROUTE N M W/U
68 Instruction that the cleared flight route is to be rejoined at or before the specified position. REJOIN ROUTE BY (position) N M W/U
69 Instruction that the cleared flight route is to be rejoined at or before the specified time. REJOIN ROUTE BY (time) N M W/U
70 Notification that a clearance may be issued to enable the aircraft to rejoin the cleared route at or before the specified position. EXPECT BACK ON ROUTE BY (position) L L R
71 Notification that a clearance may be issued to enable the aircraft to rejoin the cleared route at or before the specified time. EXPECT BACK ON ROUTE BY (time) L L R
72 Instruction to resume own navigation following a period of tracking or heading clearances. May be used in conjunction with an instruction on how or where to rejoin the cleared route. RESUME OWN NAVIGATION N M W/U
No. 2
Table A5-5. Route modifications (uplink)
Message intent/use Message element URG ALRT RESP
73 Notification to the aircraft of the instructions to be followed from departure until the specified clearance limit. (departure clearance) N M W/U
74 Instruction to proceed directly from its present position to the specified position. PROCEED DIRECT TO (position) N M W/U
75 Instruction to proceed, when able, directly to the specified position. WHEN ABLE PROCEED DIRECT TO (position) N M W/U
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