SRT AIS, Installation And Operation Manual

Page: 47 / 92

Operation
Page 45
4.6.8 Messages
AIS text messages and Safety Related Messages (SRMs) can be received
from other AIS equipped vessels and also sent to specific vessels (addressed
messages) or sent to all vessels in range (broadcast messages).
Reception of an AIS text message is indicated by the presence of the message
icon at the top of the screen. This icon is shown whenever there are unread
AIS text messages. Messages can be reviewed and replied to via the In-box.
The transceiver can store up to a maximum of 20 messages in the In-box and
20 messages in the Sent folder. If the number of messages exceeds 20 then
the oldest message will be overwritten.
When a Safety Related Message is received the user will be notified immedi-
ately with a pop-up showing the message. Standard text messages are not
displayed on receipt, however the message icon will be displayed at the top of
the screen.
AIS messages can be viewed, created and transmitted from the
‘Messages ’
menu.
The available options are:
Compose - takes you to the message composition screen
In-box - takes you to the received message list view
Sent - shows a list of recently sent messages.
To compose a new message, select the type of message from the drop down
menu and the destination. This can be by directly entering the MMSI, or by se-
lecting from a list of visible targets.
The message text is entered using the on screen keyboard. Messages are lim-
ited to 80 characters in length.
Class B transceivers are permitted to receive broadcast SRMs
and broadcast text messages, however this function is not man-
datory. Class B transceivers are not able to receive addressed
SRM or text messages. There is therefore no guarantee that text
messages or SRMs sent to a Class B transceiver will be received.
4.6.9 Long Range Messages
If the transceiver is connected to a long range communication system via the
long range communications port then long range interrogations may be re-
ceived. These are requests for information from a distant base station beyond
normal AIS operation range.
The transceiver can be configured to automatically respond to Long Range
(LR) interrogations, or you can opt to respond to any interrogation manually.
!