Transmit Power; Figure 4: Range Setting - Too Short; Figure 5: Range Setting - The Exception - Teledyne SeaBat T Series Operator's Manual

ACTIVE SONAR USAGE
With the Range set too short, the outer beams formed are not long enough to reach the seabed.
With no seabed in these beams the bottom detection process can only lock onto the noise in the
water column. An exception to this is if the seafloor to the outer parts of the swath is of no
interest and the user wishes to concentrate on a smaller seafloor coverage thereby increasing
the ping rate and hence sounding density. In this case the user should reduce the swath
coverage of the sonar. Refer to the RESON Sonar UI User Manual (see Appendix E Reference
Documentation.)
If you are operating in relatively deep water to the limits of operation and the outer parts of the
swath exceed the acoustic range of the sonar, the user should reduce the swath coverage to
cover the seabed that is visible only. This will increase the ping rate and reduce noise picked up
for these visible beams. Refer to the RESON Sonar UI User Manual (see Appendix E
Reference Documentation).

6.2.2 Transmit Power

For instructions on how to adjust this setting, refer to the RESON Sonar UI User Manual (see
Appendix E Reference Documentation).
The Power adjusts itself automatically when Tracker is selected (see also section 6.3.2 below).
6.2.2.1 Transmit Power OFF
If the Power is set to OFF, the system will not ping, but it will continue to receive data provided
that the max ping rate is not set to 0.
With the transmit power OFF, the sonar system will act as a passive sonar by only receiving data.
This is a feature that is very useful for monitoring the ambient water in order to assess the level of
background noise and interference from the vessel itself.
SeaBat T-Series Subsea Operator's Manual
Version 7
Figure 4: Range Setting – Too Short
Figure 5: Range Setting – The Exception
NOTE
Page 31 January 31, 2019