Section 8 Monitoring a Dragging Anchor  8-2 
8.1  Setting a Dragging Anchor 
Monitoring Area 
This section describes the setting of a dragging anchor monitoring area. 
The setting varies depending on whether the shape of the dragging anchor area is a circle or a 
polygon. 
[Operation procedure] 
Open the Dragging Anchor Monitoring screen by performing the following menu operations. 
[Menu] button → Anchor Watch 
 
8.1.1  Setting a dragging anchor monitoring circle 
1  Select [Circle] from the [Mode] (dragging anchor monitoring mode) combo box.   
2  Enter the centre position and size of the dragging anchor monitoring area. 
[Position]:  Input latitude in the input box. 
  Input longitude in the input box. 
[Radius]:  Input a radius of the circle in the input box. 
  Input range: 10 to 1500 m 
 
8.1.2  Setting a dragging anchor monitoring 
polygon 
1  Select [Polygon] from the [Mode] (dragging anchor monitoring mode) combo box.     
2  Click on the [New] button. 
The data of the [Point] (vertex) list is cleared. 
3  Place the cursor on the chart. 
4  Create a polygon by dragging the cursor on the chart. 
By inputting position coordinates (longitude and latitude) of the vertex position of the polygon in 
the [Point] list, the vertex position can be changed. 
When a polygon is created, the number of vertices is displayed in [(Total:)]. Up to 360 vertices 
can be set. 
 
Creation example: 
 
   
Click the right mouse button or 
double
-click on the ending point