Teledyne SeaBat T Series, Operator'S Manual, Page: 57 / 152

ACTIVE SONAR USAGE
SeaBat T-Series Subsea Operator's Manual Page 45 January 31, 2019
Version 7
Horizontal seafloor and
head set at 0° tilt
Horizontal seafloor with head
physically set to -15° and head
tilt set to 0°
Horizontal seafloor with head
physically set to -15° and head
tilt set to -15°
Figure 18: Head Tilt Functionality
6.3.4.1 Harbor Inspection (Quaysides, Breakwaters)
In this application a single head is typically tilted up to 30° (max. setting is +/-45°) from normal to
register soundings as close to the waterline as possible.
Figure 19: Head Tilt for Harbor Inspection
6.3.4.2 Pipe Inspection with Dual Head Systems
In this application each head is typically tilted up to 15° (max. setting is +/-45°) from normal,
generally looking “in”.
Figure 20: Head Tilt for Pipe Inspection
6.4 Compensation for Environmental Conditions
As sound propagates through the underwater environment, the energy is absorbed by the liquid
caused by molecular interactions that convert acoustic energy into heat. A propagating sound
field also spreads geometrically, which means that the sound pressure decreases with increasing
distance from the sonar. Other mechanisms such as bubbles, plankton, tidal currents, currents