To compute deflection angles

Use the Compute deflection angles function to calculate the horizontal, vertical, and true deflection angles between three points. The true deflection angle is the deflection angle in the plane that the three points lie on.

1. From the map, select the three points (1, 2, and 3 in the diagram above). These points may be previously measured weld points. The software will calculate the deflection angles to the third point in relation to the (projected) straight line drawn connecting the first two selected points.

2. Tap and hold in the map and select More / Compute deflection angles from the shortcut menu. Alternatively, tap and select Cogo / Compute deflection angles.

   The Compute deflection angles screen displays the selected points.

3. Tap Calc.

   The horizontal deflection angle (4) is shown. If the three points have elevations, the vertical deflection angle is also shown.

   The horizontal deflection angle is shown as a negative value if the third point is to the left of the projected line between the first two points, and as a positive value if the point is to the right.

   The horizontal deflection angle value is automatically copied to the clipboard so that you can easily paste it into the tally file (using Ctrl + V), if you wish.

   The vertical deflection angle is shown as a negative value if the third point lies above the projection of the line running from the first to the second point and positive if it lies below this line.

4. To record the computed deflection angles and the names of the three selected points in the job, tap Store.