Figure 45: T20 Dual Sonar Head Assembly In Bracket With Optional Front Fairing; Figure 46: Flow At 10 Knots Around Dual T20 With Fairings; Figure 47: Flow Around Dual T20 With Fairings, Cross Section Of Symmetry Plane - Teledyne SeaBat T Series Operator's Manual

SYSTEM PERFORMANCE AND DATA TYPES
7.9.3.2 T20 Dual Head Drag
Figure 46 illustrates the flow at 10 knots around
the T20 dual head with front fairings. The drag on
the pole, sonar heads, and bracket is in the region
of 1100N. The same situation without front fairings
is shown in Figure 48.
Figure 47 is a cross section of the symmetry plane of the T20 dual head. The front fairings and
bracket assure a steady water flow around the receivers and projectors. The same situation
without front fairings is shown in Figure 49.

Figure 47: Flow around Dual T20 with Fairings, Cross Section of Symmetry Plane

SeaBat T-Series Subsea Operator's Manual
Version 7

Figure 46: Flow at 10 knots around Dual T20 with Fairings

Page 69
Figure 45: T20 Dual Sonar Head Assembly in
Bracket with Optional Front Fairing
January 31, 2019