20-1
20. Tracked Targets (TT)
Functions
20.1 How to Show, Hide Tracked Targets and Select
Color and Size of TT Symbol
Do the procedure below to show TTs on the ECDIS display and set their color and size.
06.xx 06.xx
SINGLE
Symbol Display
Size
1. Put the cursor on the text "TT" in the information area then left-
click to select one of the options (AUTO, MAN, OFF).
2. Spin the scrollwheel to display Symbol Display/Info in the mouse
functions area then push the left mouse button.
3. Click an arrow tab in the Symbol Display dialog box until the
Targets page appears, if it is not already displayed.
4. Select desired color for TT symbol from the Color list box.
5. Select desired tracked symbol size from the Tracked Tgt Size list
box.
Small TT symbol STD TT symbol
Note 1: The ECDIS display can show up to 100 tracked targets. The alert "642 TT storage 95% full" is given when
95 tracked targets are on display. The alert "643 TT storage 100% full" is given when 100 tracked targets or more
are on display.
Note 2: AIS and tracked targets viewing limitations are as below.
• AIS and tracked targets are displayed on top of chart 1:1,000,001 for S57 charts.
• AIS and tracked targets are displayed on top of chart 1:1,900,001 for ARCS charts. This allows display of AIS
and tracked targets on top of the largest scale ocean charts (original scale 1:3,500,000) when they are zoomed to
overscale.
20.2 Dangerous Tracked Targets
A dangerous tracked target is displayed on the ECDIS as a blinking target symbol in red color. The ECDIS has its
own definition for dangerous target limits, thus a radar may show a target as dangerous while ECDIS shows it as
safe and vice versa.
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