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SYSTEM PERFORMANCE AND DATA TYPES
SeaBat T-Series Subsea Operator's Manual
Page 57
January 31, 2019
Version 7
7.2
Selectable Beam Density
Selectable beam density is a feature which allows the surveyor to decide how many beams to
form ranging from the maximum capability of the system down to just 10. This allows the surveyor
to be able to capture the highest detail using the highest beam density available, but alternatively
maximize efficiency by using fewer beams in very shallow water where data volumes traditionally
become large quickly due to high beam numbers and high ping rates.
A special mode is the ability to define the desired equidistant spacing between beams on the
seafloor and keep it constant. The system will “hold” this automatically, as depth varies, within the
constraints defined by the minimum and maximum number of beams.
Selectable beam density adds to the flexibility of the system with several benefits:
Optimized data volumes tailored to survey purpose/specifications
Save of up to 75% of data volume in very shallow water
Faster processing
Reduced time and costs from survey to deliverable
7.2.1 Beam Modes
Beam mode selection is made on the fly via the sonar user interface. For instructions, refer to the
RESON Sonar UI User Manual (
see Appendix E Reference Documentation
). Available selections
depend on options purchased (see also
).
Table 6: Beam Modes with No. of Beams and Swath Coverage
No. of beams
Swath
T20/50
T20
T50
T20/50
Min.
Std.
Max.
Std.
Max.
Max. swath
Equi-distant
(with constant no. of beams)
10
512
512
140/150
Equi-distant
(with constant beam spacing)
10
512
512
140/150
Intermediate
10
512
512
140/150
Equi-angle
10
512
512
165
FlexMode
16
512
512
512
140/150
For examples on how to use this feature, see
section
16
FlexMode is an optional add-on feature (see
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