User's Guide

User Guide for the Envoy Data Link
Document Number: UG-15000 Rev. A Page 16 of 173
2 Operation of Envoy
Envoy’s CPDLC message processing uses standard flight data and free text message elements
and includes validation to ensure message composition of downlinks is robust and valid. The
intuitive user interface has message assurance response (message acknowledgement) and
message latency monitoring.
In short, Envoy supports ATSU interoperability for aircraft in any airspace as shown in Figure 2-1,
Section 1.1.2.4 of Doc 10037, Global Operational Data Link (GOLD) Manual, First Edition, 2017.
Figure 2-1 Air Traffic Services and Aircraft Interoperable Connectivity
2.1 Envoy Menu Tree
The Envoy Main Menu has three main branches:
• ATC menu (Section 3.5) provides CPDLC functionality for ATN B1 and FANS 1/A+
• ACARS menu (Section 5) Spectralux provides a default menu of flight operations pages)
• MAINT menu (Section 6) displays flight and system/airplane data
Figure 2-2 Envoy Main Menu
The menu tree layout in Figure 2-3 shows the available user interface configurations and
maintenance :