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4. Tracked Target (TT) Operation
4-17
4.12 Set and Drift
Set, the direction in which a water current flows. The value can be manually entered in 0.1-degree steps. Drift, in
another word Rate, the speed of a tide, can also be entered manually in 0.1-knot steps.
Set and drift corrections are beneficial for increasing the accuracy of vectors and target 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: Set and drift can be entered manually only if no positioning sensor is selected for use. Otherwise, the system
calculates set and drift automatically.
To enter set and drift manually, do the following:
1. Put the cursor on the Position field in the information area
2. Push the right button. Left-click the arrows at top right corner of the SENSORS dialog box to select the Others
page.
1. Check the Manual box in the Set and Drift window. Close the SENSORS dialog box.
2. Use the trackball to select the SET box at the right side of the screen.
SET box
3. Use the scrollwheel to set value, spinning it to select numeral then pushing it to set.
(Setting range: 000.0 – 359.9 (°T))
4. Use the trackball to select the DRIFT box at the right side of the screen.
DRIFT box
5. Use the scrollwheel to set value, spinning it to select numeral then pushing it to set.
(Setting range: 00.0 – 99.9(kn))
Note: Set and drift should be checked periodically for correctness.