User's Guide

Table Of Contents
User Guide for the Envoy Data Link
Document Number: UG-15000 Rev. A Page 120 of 173
ID
CPDLC UM/Example
Use/Intent
DO-258A
50
CROSS [position] BETWEEN [level]
AND [level]
CROSS XYZ BETWEEN 20000FT
AND 25000FT
Instruction that the specified position is to be
crossed at a level between the specified levels.
51
CROSS [position] AT [time]
CROSS XYZ AT 1232
Instruction that the specified position is to be
crossed at the specified time.
52
CROSS [position] AT OR BEFORE
[time] -CROSS XYZ AT OR
BEFORE 1232
Instruction that the specified position is to be
crossed at or before the specified time.
53
CROSS [position] AT OR AFTER
[time]
CROSS XYZ AT OR AFTER 1232
Instruction that the specified position is to be
crossed at or after the specified time.
54
CROSS [position] BETWEEN [time]
AND [time]
CROSS XYZ BETWEEN 1230 AND
1250
Instruction that the specified position is to be
crossed at or after the specified time.
55
CROSS [position] AT [speed]
CROSS XYZ AT 200KTS
Instruction that the specified position is to be
crossed at the specified speed and the specified
speed is to be maintained until further advised.
56
CROSS [position] AT OR LESS
THAN [speed]
CROSS XYZ AT OR LESS THAN
200KTS
Instruction that the specified position is to be
crossed at a speed equal to or less than the
specified speed and the specified speed or less
is to be maintained until further advised.
57
CROSS [position] AT OR
GREATER THAN [speed]
CROSS XYZ AT OR GREATER
THAN 200KTS
Instruction that the specified position is to be
crossed at a speed equal to or greater than the
specified speed and the specified speed or
greater is to be maintained until further advised.
58
CROSS [position] AT [time] AT
[level]
CROSS XYZ AT 1232 AT 25000FT
Instruction that the specified position is to be
crossed at the specified time and the specified
level.
59
CROSS [position] AT OR BEFORE
[time] AT [level]
CROSS XYZ AT OR BEFORE
1232 AT 25000FT
Instruction that the specified position is to be
crossed at or before the specified time and at the
specified level.
60
CROSS [position] AT OR AFTER
[time] AT [level]
CROSS XYZ AT OR AFTER 1232
AT 25000FT
Instruction that the specified position is to be
crossed at or after the specified time and at the
specified level.
61
CROSS [position] AT AND
MAINTAIN [level] AT [speed]
CROSS XYZ AT AND MAINTAIN
25000FT AT 200KTS
Instruction that the specified position is to be
crossed at the specified level and speed, and the
level and speed are to be maintained.
62
AT [time] CROSS [position] AT
AND MAINTAIN [level]
AT 1232 CROSS XYZ AT AND
MAINTAIN 25000FT
Instruction that at the specified time the specified
position is to be crossed at the specified level
and the level is to be maintained.
63
AT [time] CROSS [position] AT
AND MAINTAIN [level] AT [speed]
AT 1232 CROSS XYZ AT AND
MAINTAIN 25000FT AT 200KTS
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.
64
OFFSET [specifiedDistance]
[direction] OF ROUTE
OFFSET 200KM LEFT OF ROUTE
Instruction to fly a parallel track to the cleared
route at a displacement of the specified distance
in the specified direction.
Table 4.6-9 Lateral
Offsets