Ais Category - Furuno FI70DSW Operator's Manual

2.9

AIS Category

H-UP
The AIS category displays basic AIS data such as bearing, range, lost and dangerous
targets. The maximum number of targets which may be displayed is 25, in order from
closest to farthest from own ship.
Range rings are fixed at 2 NM, 4 NM and 6 NM.
There are two orientations available:
• [Heading Up] - Displays the targets and own ship with the heading oriented up-
wards.
• [North Up] - Displays the targets and own ship with North oriented upwards.
Note: The AIS category is a simplified AIS, with limited function and capacity. Only
Class A and Class B AIS targets are displayed. Do not rely solely on the FI-70
indications for information about nearby targets.
AIS symbols and their meanings
The AIS symbols displayed may change, depending on the target's conditions, as
shown in the table below. The targets are displayed as a triangular symbol, with a line
extending from the triangle. The line indicates the estimated COG (Course Over
Ground) for the target and changes direction accordingly.
AIS Symbol
2. DISPLAY CATEGORIES AND CATEGORY SPECIFIC MENUS
NM
Heading Up
Activated target symbol.
Dangerous target symbol. Any targets entering the dan-
ger zone change to dangerous targets.
This symbol is displayed as a flashing symbol.
Lost target symbol. Targets whose data has been lost by
the AIS are displayed in this manner.
This symbol is displayed as a flashing symbol.
Uncertain target symbol. The CPA/TCPA for this target
cannot be calculated.
CPA is the Closest Point of Approach, TCPA is the Time
to Closest Point of Approach.
N-UP
N
North Up
Meaning
NM
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