Manual

June 2004 Isis® Sonar User's Manual, Volume 2 80
3. Hold down the left trackball button and rotate the trackball to draw a
line through the contact’s shadow (across track).
4. Release the left button when you have completed the line.
5. Target displays a cyan line spanning the contact’s shadow.
Note: If your line for the shadow is magenta, not cyan, then Target
has interpreted your shadow line as the contact’s width. That is because
your width line and your shadow line overlap by an imaginary line in the
vertical dimension. You need to redraw the shadow line so that the width
and shadow lines do not overlap.
I
f no shadow is present, you cannot measure the contact’s
height.
To remove lines in an unsaved, mensurated contact
1. Double-click with the left trackball button anywhere in the contact.
Each time you double-click, a line is removed.
2. Continue to double-click until all unwanted lines are removed.
This action also clears the information from the Contact Measure box
of the contact information window.
A typical mensurated contact might look like the sample shown in
Figure E-8.
Appendix E: Using the Target Utility