Teledyne SeaBat T Series, Operator'S Manual, Page: 81 / 152

SYSTEM PERFORMANCE AND DATA TYPES
SeaBat T-Series Subsea Operator's Manual Page 69 January 31, 2019
Version 7
7.9.3.2 T20 Dual Head Drag
Figure 46: Flow at 10 knots around Dual T20 with Fairings
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
Figure 45: T20 Dual Sonar Head Assembly in
Bracket with Optional Front Fairing
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 .