Furuno FCR-2107 Series Operator's Manual page 234

7. Vector Chart Material
7-62
Tracking page
Own ship past tracks
System: plot own ship's tracks using system-fed position.
Primary: plot own ship's past track with position fed from the primary
sensor.
Secondary: plot own ship's past track with position fed from a secondary
sensor.
Style: choose time stamp position for past track (indicated by Tick or
Point)
Length: choose length of past track
Labels: choose label interval
Target past positions
Density: Choose density of past position of points.
Style: Choose style of presentation of target's past position.
Events: These marks are based on voyage log records.
User Event: display event symbols on ECDIS, where the system has
recorded an event based on conditions you have set (Type: User and
Auto).
Auto Event: display automatically entered event symbols, where the
system has recorded an event based on conditions you have set (Type:
Ship and Alarm).
Positions display the latitude and longitude of an event.
Note 1: MOB event is always visible.
Note 2: You can choose period of time to display event marks in the list
box "Show".