artisan TRACKPOINT 3 4211A, Operation And Maintenance Manual

Page: 55 / 253

TRACKPOINT 3 INSTALLATION
2-26
The hydrophone is represented in the tracking window by a small H. Note that the H shifts
to the right along the X-axis when the positive X offset (7 meters) is entered. The H moves
down, parallel to the Y-axis, when the negative Y offset (-10 meters) is entered.
The target continues to be tracked and now displays X and Y data in relation to the pitch /
roll center of the vessel.
C. Hydrophone Depth is the depth of the hydrophone below the surface of the water. (Refer to
Figure 2-17.) Depth is entered as a positive value.
The TrackPoint 3 is ready for operation when the hydrophone is in position and the necessary off-
sets have been determined, and the acoustic sources to be tracked are active and in the water.
NOTE: If a pinger is at a depression angle of less than 20 degrees, the measured depression
angle and, therefore, the horizontal range of the beacon are impossible to measure
accurately. Consequently, the bearing of the source, relative to some offset position,
is impossible to determine. If this combination of circumstances occurs (pinger; de-
pression angle less than 20 degrees; and hydrophone offsets entered), TrackPoint
ignores the entered X and Y offsets so that it can display a correct bearing relative to
the hydrophone. Refer to section 3.6, error code 51.