Table A5-12. Additional messages (uplink)
Message intent/use Message element URG ALRT RESP
164 The associated instruction may be complied with at any future time. WHEN READY L N N
230 The associated instruction is to be complied with immediately. IMMEDIATELY D H N
165 Used to link two messages, indicating the proper order of execution of clearances/instructions. THEN L N N
Message intent/use Message element URG ALRT RESP
166 The associated instruction is issued due to traffic considerations. DUE TO (traffic type) TRAFFIC L N N
167 The associated instruction is issued due to airspace restrictions. DUE TO AIRSPACE RESTRICTION L N N
168 The indicated communication should be ignored. DISREGARD U M R
176 Notification that the pilot is responsible for maintaining separation from other traffic and is also responsible for maintaining visual meteorological conditions. MAINTAIN OWN SEPARATION AND VMC N M W/U
177 Used in conjunction with a clearance/instruction to indicate that the pilot may execute when prepared to do so. AT PILOTS DISCRETION L L N
178 (reserved) L L Y
169 (free text) N L R
170 (free text) D H R
183 (free text) N M N
187 (free text) L N N
194 (free text) N L Y
195 (free text) L L R
196 (free text) N M W/U
197 (free text) U M W/U
198 (free text) D H W/U
199 (free text) N L N
201 Not used L L N
202 Not used L L N
203 (free text) N M R
204 (free text) N M Y
205 (free text) N M A/N
206 (free text) L N Y
207 (free text) L L Y
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