User's Guide
Table Of Contents
- 1 Introduction
- 1.1 Audience
- 1.2 Overview
- 1.3 Envoy CMU Features
- 1.4 Configuration Options for Envoy
- 2 Operation of Envoy
- 3 CPDLC Operations
- 3.1 Log On
- 3.2 Logoff
- 3.3 Lost Connection
- 3.4 Typical Message Composition
- 3.5 ATC Menu
- 3.5.1 ATC Request Menu – FANS 1/A+ and ATN B1 CPDLC Common
- 3.5.2 ATC REPORT Menu
- 3.5.3 WHEN CAN WE EXPECT
- 3.5.4 POS REPORT Message – FANS 1/A+
- 3.5.5 EMERGENCY (MAYDAY) Message – FANS 1/A+
- 3.5.6 ATC MSG LOG
- 3.5.7 CLEARANCE REQUESTS – FANS 1/A+
- 3.5.8 FREE TEXT 1/2
- 3.5.9 ATC VOICE CONTACT Message – FANS 1/A+
- 3.5.10 Cancel EMERGENCY, Cancel ADS
- 3.5.11 Flight Plan Transactions and Monitoring
- 4 Automatic Dependent Surveillance (ADS)
- 5 ACARS Operations
- 6 MAINTENANCE Menu
- Appendix A Acronyms
- Appendix B AFN Messages
- Appendix C Supported CPDLC Messages
- Appendix D ADS-C Tags
- Appendix E ACARS Message Labels
- Appendix F ATSU Call Signs (ICAO, IATA)
- Appendix G Fault Management
User Guide for the Envoy Data Link
Document Number: UG-15000 Rev. A Page 10 of 173
1 Introduction
This document is a functional description of the Spectralux Envoy Data Link All-In-One and
contains common procedural scenarios and field-level help for all pages of a full-featured Envoy
configuration, including all COMM modes and maintenance pages accessible by the aircrew.
1.1 Audience
This document is intended for aircrew training and is meant to be used in conjunction with other
training material, such as Computer Based Training (CBT).
This document assumes that the aircrew audience is knowledgeable in the use of data link
systems specific to the airspace and aircraft.
1.2 Overview
The Spectralux Envoy data link system offers best-in-class multi-frequency communications, giving
aircraft and aircrews the capability to send and receive ATS messages via Controller Pilot Data
Link Communications (CPDLC) and/or Aircraft Communications Addressing and Reporting
Systems (ACARS). The Envoy has its own internal VHF Data Radio (VDR) which provides auto-
tuning of VHF frequencies for VDL Modes A/2 operation. The Envoy internal VDR is a data radio
only and will not provide VHF voice capability.
The Envoy also acts as a Communications Management Unit (CMU) providing a connection to
external SATCOM systems while in VHF NO COMM areas, ensuring uninterrupted data link
functionality.
FANS 1/A+ functionality supports Automatic Dependent Surveillance - Contracts (ADS-C), which
provides for surveillance of flights while within VHF and SATCOM coverage areas. This capability
continues to provide surveillance in regions where ground-based radar is not available.
The Envoy provides a visual display of message transactions and relieves pilot workload by
providing predictive formatting and construction of downlink messages and responses to ground-
based instructions from air traffic services (ATS), Aeronautical Operational Control (AOC), and
other end systems over Very-High Frequency Digital Link (VDL) Mode A/2 and SATCOM networks.
The robust design uses message elements and preformatted responses to streamline message
exchanges and automate transaction processes. Support of standard message elements
minimizes the risk of input errors and misunderstandings, facilitating effective communications for
the aircrew. The aircrew can request and review clearance data, and ground systems can conduct
conformance monitoring via event driven automated reporting.
1.2.1 Compliance
Envoy provides CPDLC compliance with both Aeronautical Telecommunication Network (ATN) and
Future Air Navigation System (FANS) 1/A+ specification, along with a flexible ACARS solution to
satisfy the most demanding requirements of airline flight operations and maintenance departments.
The Envoy fully supports equipage mandates for data link capabilities, including:
SES for DLS Mandate (Link2000) for EATMN
FANS 1/A+ Mandate for NAT HLA
FANS en route service in the US