Final answer:
You lose steering ability on a personal watercraft when it is not under power because steering requires thrust from the engine. Regaining control necessitates applying power to the craft.
Step-by-step explanation:
When operating a personal watercraft (PWC), you may lose steering ability when the craft is not under power, as the steering of a PWC is directly linked to its thrust. Steering loss can occur if the engine is turned off or if the throttle is released, as there will be no water being forced through the steering nozzle that directs the craft. To regain steering control, power must be applied to provide the necessary thrust for maneuverability. It is crucial for operators to keep this in mind to maintain control of the PWC and prevent accidents.