User's Instructions

DCU DEBEG 3401
ED 3047 G 122 / – (2002-12)
Operating Instructions
1 Overview
b_ai_e01.fm / 19.12.02
6
Targets and AIS Objects
With regard to the objects that can be detected by the AIS system and whose data can be displayed, a
distinction is drawn between the following:
- Targets: ships that are equipped with an AIS system, divided into
- Class A targets: ships that are subject to the SOLAS Convention (see above)
- Class B targets: all other ships and boats, e.g. including pleasure craft
- SAR aircraft: search-and-rescue aeroplanes or helicopters
- Base stations: shore stations of the AIS system, e.g. traffic control centres
☞ In the equipment described here, SAR aircraft are treated in much the same way as AIS Class A
targets, and are mentioned only in those cases where there are differences.
☞ For simplification, this Operating Instructions uses the designation "target(s)" for all ships and objects
sending data via AIS.
Situation Display
Targets and the own ship symbol can be displayed in a Situation
Display. The triangular symbols indicate the headings of the targets.
In addition to the Situation Display, it is also possible to display the
data received from a target (e.g. its position, course, speed, heading,
name, destination etc.), as well as data determined by the DCU rela-
tive to the own ship (range, bearing) - see Section 3.2.
Safety Messages and Long Range Interrogation
Via the, Safety Messages
1)
can be communicated if necessary, which
are then passed on by all receiving AIS systems as a message or an
alarm to their display units. The procedures for dealing with the Safety
Messages received, and for transmitting your own Safety Messages,
are described in Section 4.1 and 4.2.
1)
Also called Safety Related Messages in the relevant regulations.
The Display and Control Unit (DCU)
Situation Display:
Own ship with heading line,
targets and range rings