曝光台 注意防骗
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be expected for the aircraft to
commence climb at the specified time
to the specified level.
AT (time) EXPECT CLIMB
TO (level)
L L R
14 Notification that an instruction should
be expected for the aircraft to
commence climb at the specified
position to the specified level.
AT (position) EXPECT
CLIMB TO (level)
L L R
15 Notification that an instruction should
be expected for the aircraft to
commence descent at the specified
time to the specified level.
AT (time) EXPECT
DESCENT TO (level)
L L R
16 Notification that an instruction should
be expected for the aircraft to
commence descent at the specified
position to the specified level.
AT (position) EXPECT
DESCENT TO (level)
L L R
17 Notification that an instruction should
be expected for the aircraft to
commence cruise climb at the
specified time to the specified level.
AT (time) EXPECT CRUISE
CLIMB TO (level)
L L R
18 Notification that an instruction should
be expected for the aircraft to
commence cruise climb at the
specified position to the specified
level.
AT (position) EXPECT
CRUISE CLIMB TO (level)
L L R
19 Instruction to maintain the specified
level.
MAINTAIN (level) N M W/U
20 Instruction that a climb to a specified
level is to commence and once
reached the specified level is to be
maintained.
CLIMB TO (level) N M W/U
21 Instruction that at the specified time a
climb to the specified level is to
commence and once reached the
specified level is to be maintained.
AT (time) CLIMB TO (level) N M W/U
22 Instruction that at the specified
position a climb to the specified level
is to commence and once reached the
specified level is to be maintained.
AT (position) CLIMB TO
(level)
N M W/U
Message intent/use Message element URG ALRT RESP
A5-4 Air Traffic Management (PANS-ATM)
1/11/01
185 Instruction that after passing the
specified position a climb to the
specified level is to commence and
once reached the specified level is to
be maintained.
AFTER PASSING (position)
CLIMB TO (level)
N M W/U
23 Instruction that a descent to a
specified level is to commence and
once reached the specified level is to
be maintained.
DESCEND TO (level) N M W/U
24 Instruction that at a specified time a
descent to a specified level is to
commence and once reached the
specified level is to be maintained.
AT (time) DESCEND TO
(level)
N M W/U
25 Instruction that at the specified
position a descent to the specified
level is to commence and once
reached the specified level is to be
maintained.
AT (position) DESCEND TO
(level)
N M W/U
186 Instruction that after passing the
specified position a descent to the
specified level is to commence and
once reached the specified level is to
be maintained.
AFTER PASSING (position)
DESCEND TO (level)
N M W/U
26 Instruction that a climb is to
commence at a rate such that the
specified level is reached at or before
the specified time.
CLIMB TO REACH (level)
BY (time)
N M W/U
27 Instruction that a climb is to
commence at a rate such that the
specified level is reached at or before
the specified position.
CLIMB TO REACH (level)
BY (position)
N M W/U
28 Instruction that a descent is to
commence at a rate such that the
specified level is reached at or before
the specified time.
DESCEND TO REACH
(level) BY (time)
N M W/U
29 Instruction that a descent is to
commence at a rate such that the
specified level is reached at or before
the specified position.
DESCEND TO REACH
(level) BY (position)
N M W/U
192 Instruction that a change of level is to
continue, but at a rate such that the
specified level is reached at or before
the specified time.
REACH (level) BY (time) N M W/U
209 Instruction that a change of level is to
continue, but at a rate such that the
specified level is reached at or before
the specified position.
REACH (level) BY (position) N M W/U
30 Instruction that a level within the
defined vertical range specified is to
be maintained.
MAINTAIN BLOCK (level)
TO (level)
N M W/U
Message intent/use Message element URG ALRT RESP
Appendix 5 A5-5
1/11/01
Note.— Wherever the variable “level” is specified, the message can specify either a single level or a vertical range, i.e. block
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