Each trigger group is visually separated by a yellow vertical group line.
By inspecting the trigger chart for a particular group it is possible to see which echo
sounder is taking the longest to complete its ping cycle. This echo sounder will have a
red line that starts at the beginning and extends all the way to the end of the group. This
is illustrated in figure
on page 39.
Figure 31
Echo sounder – OS 38
This plot shows an echo sounder, OS 38, which has the longest period in the group and
consequently determines the maximum ping rate for the groups it is assigned to.
The duration along the horizontal axis can be set depending upon the typical ping rate.
In deep water the display will be more readable if a longer duration is selected. The
display period can be set to 5, 10, 30 or 60 seconds. The settings available are shown in
figure
on page 39.
Figure 32
Display settings
The trigger display settings allow the width of the display to be modified and the group
marker to be enabled or disabled.
The group marker drawn between each trigger group can be turned off. There is also
an indicator to notify when display data from Synchronizing Unit is not being received
properly. The yellow indicator warns the operator that the trigger plots may not be
accurate at the moment. This may happen if the CPU usage of Workstation is high.
An overview of how plots in the trigger display relates to the signal interface can be
found in Appendix A.
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