Triton Isis - Manual (Page 156)

June 2004 Isis® Sonar User's Manual, Volume1 142
Figure 8-14: Trackpoint-enabled layback correction method
The two methods of computing the towfish position are mutually exclusive.
That is, enabling the Trackpoint option disables the Layback/Cable method
and vice versa. Both types of data may be recorded in the .XTF file. The
user chooses which method to apply in the Layback Correction dialog box.
• Current Delta X: The X-offset (East or West) in meters from the
Trackpoint head to the towfish.
• Current Delta Y: The Y-offset (North or South) in meters from the
Trackpoint head to the towfish.
• Error code: The Trackpoint system transmits an error code for each
update. This value represents the confidences that the Trackpoint
system has in each update — the higher the value the better the
position.
• Ignore vals with code less than: A zero here will allow all updates to be
used. Higher values (vals) will filter out poor positions. See the
Trackpoint manual for more information.
Chapter 8: Using the View Menu