
June 2004 Isis® Sonar User's Manual, Volume1 228
Figure 9-29: Typical ASCII file generated by Subbottom Picking and
Tracking
9.14.6 Operational Notes
• You must have only one channel displayed in the window on which SBP
is being performed.
• You can use the Digitize Lines and Polygon function in conjunction with
subbottom-tracking to generate both layer and feature lists.
• Don’t enlarge or shrink size of the subbottom data window while
performing SBP. Isis may get confused about which data needs to be
written to the output file. You can, however, freely use Delay and
Duration to keep the data enlarged in the window.
• Don’t use Speed Correct in the subbottom window.
• Using SBP simultaneously from several windows has not been tested.
• You can instruct Isis to correct the display of any subbottom channel for
variations in towfish depth. Refer to
8.2, ‘Depth Delay and
Duration,’
for details.
Chapter 9: Using the Tools Menu
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