R5
SUPREME Secure W-AIS System
CONFIGURATION
7000 118-524, C1
Page 33
Figure 22
– Operational Mode view
3.7.1
Normal Mode
In this mode the R5 SUPREME W-AIS system performs the functions of a normal R5
SUPREME Class A AIS Transponder system, and operates as an IMO approved unit.
Outgoing messages are broadcast in the open format on both AIS channels. The
encrypted link is not active in this mode, thus no encrypted messages will be received
or sent on the link.
NOTE: When switching to Normal operational mode, any active bogus AIS
setting will be disabled.
3.7.2
Silent Mode
The unit will not broadcast any messages and it will not respond to any interrogation
message from other units. The R5 SUPREME will receive standard AIS messages, like
any normal Class A AIS Transponder. If an encrypted link has been defined, the unit
will also be able to receive and decrypt messages received over the encrypted link.
3.7.3
Tactical Mode
The R5 SUPREME W-AIS Transponder receives and processes standard AIS
messages and messages on the encrypted link. The R5 SUPREME W-AIS will
automatically generate position and status reports for broadcast on the encrypted link.
The unit will not broadcast any unencrypted messages and it will not respond to any
unencrypted interrogation messages from other units.
User generated messages can also be broadcast on the encrypted link.
The encrypted link has to be configured in order to make this mode operational, see
section 3.1.
3.7.4
Hybrid Mode
This mode can typically be used before switching to Tactical mode and after operation
in Tactical mode. The encrypted link is active and the R5 SUPREME W-AIS receive
both open AIS messages and messages on the encrypted link. The R5 SUPREME W-
AIS will also transmit both standard AIS messages on the AIS frequencies and
encrypted messages on the encrypted link.
The Hybrid operational mode is also used to transmit bogus reports on the normal AIS
channels while sending true information on the encrypted link.
