R5
SUPREME Secure W-AIS System
R5 SUPREME S W-AIS SYSTEM OVERVIEW
7000 118-524, C1
Page 7
1
R5 SUPREME S W-AIS SYSTEM OVERVIEW
The R5 SUPREME S W-AIS System is based on the R5 SUPREME AIS product, but offers
great benefits for qualified customers. In addition to working as a Class A transponder, it will
give access to other modes of operation enabling encrypted communication between friendly
units and other additional capabilities.
The system features five different modes of operation:
Normal
(IMO approved Class A Mode)
Silent
(No transmissions on VHF, Receive only)
Tactical
(Encrypted transmissions only)
Hybrid
(Encrypted and open transmissions)
External
(Transmit externally input binary messages only)
The R5 Secure W-AIS products include three different techniques for sending encrypted AIS
data. These are called link types, and are referred to as
Secure
BFT
STEDS
In addition the system offers a set of features to modify the content of publicly transmitted
data. These functions are referred to as Bogus AIS, and are available when the system is
operated in Hybrid mode.
1.1
Encrypted AIS
The R5 S W-AIS systems must have a cipher key programmed to enable encrypted
communication. The system can store up to 127 keys in non-volatile memory, but only
one key will be used at a time.
The encryption key(s) can be entered either manually via the graphical interface or read
from an USB memory. The Saab TransponderTech Secure AIS Key Generator SW
(product number 7000 100-776) can be used to produce encryption keys.
1.1.1
Saab Secure Link
Saab’s unique solution which offers automatic encryption of position reports as well as
generic data for exchange on a dedicated VHF channel. The secure operation can be
performed simultaneously with reception of standard AIS data on the two global AIS
channels. This mode will offer maximum performance with a minimum overhead,
without disturbing other AIS users.
The Secure Link operates on a third VHF channel separate from and independent of
the two normal AIS channels. The third channel is tuneable by the R5 Secure W-AIS
Transponder between 156-163 MHz. Please note that approval from authorities may be
required to use an additional frequency for Secure AIS Link purposes.
Encrypted position reports can autonomously be sent on the secure link. Encrypted
binary and safety related messages are also supported as well as interrogations, e.g.
