Modeled streamlines, colored by pressure, of 5 m/s flow (corresponding to a speed of 10 knots) over an Acousonde 3B tag attached to a flat surface. The straight streamlines and relatively constant pressure suggest that, when aligned with the flow direction, the tag produces minimal disturbance and flow remains laminar. Modeled February 2013 using Solidworks Flow Simulation. Courtesy of Keith Holmes & Melissa Green, Syracuse University.