Figure 3.

Presentation of differences between the angle‐corrected velocity v _ac and the velocity v _wss that should be used in the WSS estimation for 3 possible cases; v _ac is obtained by the conventional PWD with angle correction, where v _D is the result directly measured by PWD and θ is the beam‐to‐flow angle; v _wss is derived from the vector velocity $\overrightarrow{v}$, which is also considered the true velocity in the vessel.