Message intent/use Message element URG ALRT RESP
228 Instruction to report the estimated time of arrival at the specified position. REPORT ETA (position) L L Y
131 Instruction to report the amount of fuel remaining and the number of persons on board. REPORT REMAINING FUEL AND PERSONS ON BOARD U M Y
132 Instruction to report the present position. REPORT POSITION N M Y
133 Instruction to report the present level. REPORT PRESENT LEVEL N M Y
134 Instruction to report the requested speed. REPORT (speed type) (speed type) (speed type) SPEED N M Y
135 Instruction to confirm and acknowledge the currently assigned level. CONFIRM ASSIGNED LEVEL N L Y
136 Instruction to confirm and acknowledge the currently assigned speed. CONFIRM ASSIGNED SPEED N L Y
137 Instruction to confirm and acknowledge the currently assigned route. CONFIRM ASSIGNED ROUTE N L Y
138 Instruction to confirm the previously reported time over the last reported waypoint. CONFIRM TIME OVER REPORTED WAYPOINT N L Y
139 Instruction to confirm the identity of the previously reported waypoint. CONFIRM REPORTED WAYPOINT N L Y
140 Instruction to confirm the identity of the next waypoint. CONFIRM NEXT WAYPOINT N L Y
141 Instruction to confirm the previously reported estimated time at the next waypoint. CONFIRM NEXT WAYPOINT ETA N L Y
142 Instruction to confirm the identity of the next but one waypoint. CONFIRM ENSUING WAYPOINT N L Y
143 The request was not understood. It should be clarified and resubmitted. CONFIRM REQUEST N L Y
144 Instruction to report the selected (SSR) code. CONFIRM SQUAWK N L Y
145 Instruction to report the present heading. REPORT HEADING N M Y
146 Instruction to report the present ground track. REPORT GROUND TRACK N M Y
182 Instruction to report the identification code of the last ATIS received. CONFIRM ATIS CODE N L Y
147 Instruction to make a position report. REQUEST POSITION REPORT N M Y
No. 2
Message intent/use Message element URG ALRT RESP
216 Instruction to file a flight plan. REQUEST FLIGHT PLAN N M Y
217 Instruction to report that the aircraft has landed. REPORT ARRIVAL N M Y
229 Instruction to report the preferred alternate aerodrome for landing. REPORT ALTERNATE AERODROME L L Y
231 Instruction to indicate the pilot’s preferred level. STATE PREFERRED LEVEL L L Y
232 Instruction to indicate the pilot’s preferred time and/or position to commence descent to the aerodrome of intended arrival. STATE TOP OF DESCENT L L Y
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