Area Control Services

Issuance of a clearance

(name of unit) CLEARS ( aircraft identification)

(aircraft) CLEARED TO

RECLEARED (amended route portion) TO

(significant point of original route)

ENTER CONTROL AREA (or ZONE) [via

(SIGNIFICANT POINT)] at (level) [AT (time)]

LEAVE CONTROL AREA (or ZONE) AT (level)

(or CLIMBING, or DESCENDING)

JOIN (specify) AT (significant point) AT (level)

[AT (time)]

Indication of route and clearance limit

FROM (place) TO (place)

TO (place) Followed as necessary by:

DIRECT

VIA (route and/or reporting points)

VIA FLIGHT PLANNED ROUTE

Note:- Conditions associated with the use of

this phrase are in Part III, 12.2

VIA (distance) ARC (direction) OF

(name of DME Station) DME

(level or route) NOT AVAILABLE DUE (reason)

ALTERNATIVE[S] IS/ARE (levels or routes)

ADVISE

Maintenance of specified levels

MAINTAIN (level) [TO (significant point)]

MAINTAIN (level) UNTIL PASSING (significant

point)

MAINTAIN (level) UNTIL (time)

MAINTAIN (level) UNTIL FURTHER ADVISED

MAINTAINED (level) WHILE IN CONTROLLED

AIRSPACE

MAINTAIN AT LEAST (number) METRES

(or FEET) ABOVE (or BELOW) (aircraft

identification)

Note:- the term “MAINTAIN” is not used in lieu

of “DESCEND” or “CLIMB” when instructing

an aircraft to change level

Specification of cruising levels

CROSS (significant point) AT (or ABOVE, or

BELOW) (level)

CROSS (significant point) AT (time) OR

LATER (or BEFORE) AT (level) [MAINTAINING

OWN SEPARATION AND VMC]

CRUISE CLIMB BETWEEN (levels) (or ABOVE

(level)) CROSS (distance) (name of DME

station) DME AT (or ABOVE, or BELOW)

(level)

Emergency descent

* EMERGENCY DESCENT (intentions)

EMERGENCY DESCENT AT (significant point

or location) ALL AIRCRAFT BELOW (level)

WITHIN (distance) OF (significant point or

navigation aid)

LEAVE IMMEDIATELY (followed as necessary

by specific instructions as to direction,

heading or track etc.)

If clearance cannot be issued

EXPECT CLEARANCE AT (time)

immediately upon request

En route absorption of terminal delay

AT (time or position) DESCEND TO (level) FOR

EN ROUTE DELAY OF (number) minutes

Separation instructions

CROSS (significant point) AT (time)

ADVISE IF ABLE TO CROSS (significant point)

AT (time);

MAINTAIN MACH (number)

Departure instructions

AFTER DEPARTURE TURN RIGHT (or LEFT)

HEADING (three digits)

TURN RIGHT (or LEFT) HEADING (three digits)

TRACK (three digits) DEGREES [MAGNETIC

or TRUE] TO (or FROM) (significant point)

UNTIL (time, or REACHING (fix or significant

point or level)) [BEFORE SETTING HEADING];

SET HEADING AT (or BEFORE, or LATER

THAN) (time)

SET HEADING TO (or DIRECT) (significant

point) AT (or BEFORE, or LATER THAN) (time)

AFTER REACHING (or PASSING) (level or

significant

point)

SET

HEADING [DIRECT]

(significant point)

CLEARED VIA (designation).

Note:- Conditions associated with the

use

of

this phrase are in Part III, 12.2

Approach instructions

CLEARED VIA (designation)

CLEARED

TO

(clearance

limit)

VIA

(designation)

CLEARED VIA (details

of

route

to

be

followed)