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Show Predictors causes each vessel to display a predictor line indicating approximately where the vessel will be
if it maintains the same course and speed for a period of time. The predictor time used for AIS vessels is the
same as the time set for your own boat in the Boat Properties.
Show Vessel Names causes the names of vessels to appear near their symbol on the chart. (Rose Point ECS will
attempt to prevent names from overlapping and causing too much clutter, so some vessel names may not
appear even when this option is enabled.) When this option is disabled, you can selectively display the names of
some vessels by right-clicking on a vessel and selecting the Show Name option.
Show Vessel Speeds causes the speed of the vessel to appear near their symbol on the chart.
Show Vessels with Class B Equipment can be used to show or hide vessels that are using Class B AIS
Transponders. Normally this option should be enabled, but it can be used to help reduce chart clutter in areas
with many smaller vessels.
Show Dead Reckoned Position causes the locations of vessels to be predicted and displayed every second rather
than only when a position report is received. The predicted location of a vessel appears as a semi-transparent
version of the vessel's symbol.
Default Vessel Color selects the color to use for an AIS vessel symbol on the chart by default. The color may be
changed on a vessel by vessel basis using the Property Panel.
Other Targets
Show Base Stations causes the locations of AIS Base Stations to be shown on the chart.
Show Aids to Navigation causes the locations of AIS Aids to Navigation (AtoNs) to appear on the charts.
Show Search and Rescue Planes causes the locations of search and rescue planes (that are transmitting an AIS
signal) to appear on the chart.
Safety
Flash Lost and Dangerous Targets causes targets that have been lost or are considered dangerous to flash on
the chart. (Targets are considered to be lost when a position report has not been received from them in the past
90 seconds.)
The Hide Lost Targets After option specifies how long a target should be displayed after having been lost.
The Closest Point of Approach (CPA) and Time to CPA (TCPA) for each vessel is calculated each time a vessel or
your boat moves. These values indicate how close you will approach the other vessels provided no one changes
course or speed. Vessels are considered dangerous when they will be closer than the Danger CPA distance
option within the Danger TCPA time option. Dangerous vessels appear in red and may flash (based on the option
mentioned above).
Assume Stationary Targets are Safe prevents a target that is not moving from being considered dangerous. This
option is very handy when you are in areas with a lot of moored vessels that you will be passing close to, but are
not likely to collide with.
Show predicted passing points in channels controls the display of marks that indicate predicted passing points
along rivers, channels, or the active route. You can select “only for vessels I enable” to take manual control over
these marks or “for all vessels” to automatically display a mark for each appropriate vessel. In either mode, you
can right-click on an AIS vessel and select the Show Predicted Passing Point option to hide or show the mark for
that vessel. The predicted passing points can be much more accurate than the normal CPA/TCPA since the
CPA/TCPA feature assumes vessels will move in a straight line which is usually not the case on a river or in a
restricted channel.
Rose Point ECS Reference
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