User's Guide

Table Of Contents
User Guide for the Envoy Data Link
Document Number: UG-15000 Rev. A Page 37 of 173
Step 4. Sending/Open/Closed Status
Upon pressing send, the ATC MSG LOG updates
to show both messages as closed, with identifiers:
U (for uplink) or D ( for downlink)
Timestamp
Partial description of the message(s) in
this dialog
With no open ATC messages, the ATC
annunciator extinguishes.
For additional detail about UM and DM messages and the types of message response attributes
(AFFIRM, WILCO, UNABLE, etc.), see Appendix C and Appendix D.