6-61 Section 6 Target Tracking and AIS
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6.8 Track Function
6.8.1 Setting the Past position
1 Select the track display interval time from the past position interval selector combo
box for other ship information at the upper right of PPI.
The past position is set.
[Off] : Tracks are not displayed.
[Numeric] : Tracks are displayed at intervals of the specified value.
The past position function can display up to ten past positions of a target under tracking. The past
position display interval can be set to specified time intervals of 0.5, 1, 2, or 4 minutes, or specified
range intervals of 0.1, 0.2, 0.5, or 1 NM.
When [Off] is displayed, the track display function is turned off.
The track mode operates in conjunction with the vector mode, and a true or relative track is displayed.
In relative vector mode, the relative tracks of the target are displayed.
In true vector mode, true tracks that are calculated from the relative bearing, range, own ship's course,
and speed are displayed.
Note
When the target is acquired, past position of traced target is start plot. When the AIS target is
displayed, past position of AIS target is start plot. If the past position plotted time or range is short,
the indicated past position duration may not have achieved the specified time or range.
6.8.2 Setting the other ship's tracks
This function makes settings for the tracks of tracked targets and AIS targets.
This equipment can display the tracks of up to 20 target ships.
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