Chapter 6 MDC-1840BB/1841BB/1860BB/1810BB/1820BB Series
Using The Menu
Operation Manual
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SOG, RNG and BRG) will be displayed in the AIS data window.
Dangerous Target
If predicted CPA and TCPA values of a Target are smaller than the one being set up,
the AIS target symbol will turn to a flashing bold symbol as shown below.
If the target is a "Sleeping Target", it will be an "Activated Target" automatically.
Lost Target
A target that strays out of tracking is termed “Lost Target.” The lost symbol is
displayed flashing with a line drawn across. When an activated target changes to a
lost target, the buzzer sounds. When a sleeping target changes to a lost target, the
buzzer does not sound and the symbol will disappear automatically approx. 1 minute
later.
NOTE:
The radar vector (generated by EPA or ATA) and the AIS vector may differ in terms of
the vector length and its direction. This is not a fault. The radar vector is developed
based on the past target positions stored either by manual plotting (EPA) or automatic
tracking (ATA). Meanwhile, the AIS vector is generated from the navigation data sent
from the AIS transponder. The radar vectors take a certain time until they are fully
displayed, while the AIS vector is displayed as soon as the AIS data is received from
Figure 6.12 Alarm Target Symbol
Figure 6.13 Lost Target Symbol
Figure 6.11 Selected Target Symbol
