Raymarine axiom pro 9 RVX Installation Instructions Manual page 289

Target vectors
The vectors can be set to True or Relative.
The Vector length identifies where the target will be after the specified time has passed. You can
adjust the length of the vector by selecting a time from the Vector length pop-over options.
Additional CPA and target information can be displayed for each target using the context menu
(select a target to display the context menu).
Target history
Target history plots a target's previous position and displays it as a Gray target icon for the specified
period of time.
Target history can be enabled and disabled and the history time period can be selected from the
Target Settings tab.
Radar application
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