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3. TARGET TRACKING (TT)
3-14
3.10.1 How to enable/disable the past position display, select past
position reference
Click the indications circled in the figure below to set the plot interval (or disable the
display) and the past position reference (true or relative).
3.10.2 Past position points
You can show 5 or 10 past position points per tracked target. Right-click the past po-
sition indication then select [Past POSN Menu] to show that menu. Set [6 TT PAST
POSN POINTS] to [5] or [10].
3.11 How to Enter Set and Drift
Set, the direction in which a water current flows, can be manually entered in 0.1-de-
gree steps. Drift, the speed of the tide, can also be entered manually in 0.1 knot steps.
When course through water and speed through water are available, activate set and
drift to get course over ground and speed over ground.
Set and drift corrections are beneficial for increasing the accuracy of vectors and tar-
get data. Refer to the tide table on board the ship for setting information. These values
are applied to all targets. If stationary targets have vectors, set and drift values should
be adjusted until they lose vectors.
Note: For the IMO type, turn off the AIS function in order to enter set and drift.
To enter set and drift do the following:
1. Right-click the speed indication then select [OS Info Menu] to show the [OWN
SHIP INFO] menu.
2. Select [2 SYSTEM SETTING] or [3 LOCAL SETTING] as appropriate.
Past position
reference
Plot interval, past
position display
ON/OFF