Specifications

BATS AND PORTABLE BATS INSTALLATION
2-47
The bearing value is the number of degrees that you need to add or subtract to the dis-
played target bearing to bring it to 0.0 degrees. For example, a minus 5 degrees would
subtract 5 degrees from the target (beacon) bearing while a positive 5 degrees would add to
the present target bearing. See Figure 2-26.
6. To check the bearing value determined in step 5, take the weighted beacon line to the stern
of the vessel and again hang it straight down at the same distance from the vessel center-
line as the hydrophone (position B2 in Figure 2-25).
The target bearing should now be 180 degrees on the Trackman display.
7. A further cross check can be performed by taking the weighted beacon to a position directly
across the vessel from the hydrophone (position B3 in Figure 2-25). The target bearing dis-
play should now read either 090 or 270 degrees, depending on which side of the vessel the
mounting is located.