User's Instructions

DCU DEBEG 3401
ED 3047 G 122 / – (2002-12)
Operating Instructions
5 AIS Settings, Voyage Data and Other Displays
5.2 Displaying Own AIS Data
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5.2 Displaying Own AIS Data
The AIS data currently being sent by own system can be partially viewed in the Target Data Display. The
display occurs if, in the Situation Display, the own ship symbol is marked instead of a target (see Section
3.2).
5.3 Channel Management
The AIS Electronics Unit has two redundant VHF transceivers
1)
(Channel A and Channel B), by which all
AIS data described are transmitted and received. For the communication, various VHF channels are
possible.
The AIS system cannot function unless all AIS systems communicate on the same VHF channels and
unless the communication bandwidth and the transmission level are correctly set. The settings needed
for this are normally made automatically as described in the following. It is also possible to make a setting
manually, but this should only be done in exceptional cases after the ship's command personnel have
been informed accordingly.
Automatic Setting Procedure
As default values, VHF channels 2087 and 2088 are used, the bandwidth setting is Auto, and transmis-
sion is performed with power level High; transmission and reception take place on both channels.
In particular situations or geographical regions, it is necessary to deviate from these settings. The neces-
sary values are received by the AIS system from a base station either
- via DSC (VHF channel 70). For this purpose, each AIS system has an additional DSC receiver or
- via one of the VHF transceivers.
The data set received in this way also contains the information about the region in which these settings
are to be used, including the transition zone surrounding that region.
As soon as the ship reaches one of the regions defined in the stored data sets, the AIS system uses the
settings of the relevant data set. When the ship leaves the transition zone defined in that data set, there
is a switch-over back to the default values or a switch-over to the data defined for that region.
☞ As soon as the Electronics Unit uses a different data set, this fact is indicated by the alarm Channel
management changed.
1)
In fact, it contains two receivers and only one transmitter. By automatic frequency-selection, the transmitter can, in effect, be operated with
both receivers simultaneously. Therefore, for the sake of simplicity, it is possible to speak of "two transceivers" here.
1. Press MENU.
2. In the menu, mark VOYAGE by means of the ArrowUp/ArrowDown keys and press
ENTER.
3. In the VOYAGE DATA dialog, use the ArrowUp/ArrowDown keys to mark the field that
is to be altered, and alter the content. Complete the editing process by means of ENTER.
4. If necessary, repeat the process for other fields as well.
Back: Press APPLY, and then press BACK.
Operating Sequence