12-1
12. AUTOMATIC IDENTIFICATION
SYSTEM (AIS)
12.1 AIS Introduction
AIS is a system that continuously transmits the identification and position of your ship
to other nearby ships. All such ships also receive data from other AIS equipped ships
and display their positions and other relevant information. The AIS broadcasts this in-
formation over a VHF transceiver. Data include:
12.2 How to Show or Hide the AIS Symbols
1. On the radar display or chart plotter display, select [Targets] from the RotoKey
menu.
2. To show the AIS symbols, select [AIS/DSC]. To hide the AIS symbols, deselect
[AIS/DSC].
12.3 AIS Target Symbols
• Position • Call sign
• Name of ship • Speed over ground
• Course over ground • Name of position-fixing equipment
• Position of position-fixing equipment • Rate of turn
• Heading
Target
type
Symbol Description
Activated
AIS target
COG is marked on the symbol
with a dotted line.
Danger-
ous AIS
target
The target whose values for
both CPA and TCPA are
smaller than [CPA Alarm Val-
ue] and [TCPA Alarm Value],
which are set in [Targets] of
the main menu, is indicated as
a dangerous target.
Color: Blue for the Class A AIS
: Green for the Class B AIS
SOG and
COG vector
ROT (Rate of Turn)
Heading line
Color: Red
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