Steady State Tracking requires which condition during the history window?

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Steady state tracking relies on observing a constant, unaccelerated relative motion between your ownship and the target over the history window. If neither vessel changes course or speed during the 3-minute window, the relative range and bearing change at a steady rate, allowing a stable, linear trajectory to be established. Any maneuver—changing course or speed—introduces acceleration, breaking that steady-state assumption and forcing the tracker to adapt the model. The option that both vessels maneuver contradicts the need for a fixed history, while the ownship staying constant with a changing target also disrupts constant relative motion. Wind data doesn’t influence the relative motion used to update the track, so it isn’t part of the steady-state condition.