Dynamic attitude changes result in the Acoustic Doppler Current Profiler (ADCP) on the platform generating rotational line speed, which introduces errors in measuring vessel and water flow velocities. This study explores these errors, focusing on factors such as the angle between the transducer’s rotational radius and the central axis of the Janus structure, the magnitude of the rotation radius, the actual velocities of the vessel and water flow, and the initial amplitude of the swing. Additionally, the study examines the ability of the Janus structure to reduce swing-related errors. The feasibility of using affordable, widely accessible inertial devices to correct for swing errors is also investigated.