When is the cabin announcement regarding the ditching survival plan made?

The cabin announcement regarding the ditching survival plan is made after the aircraft comes to a complete stop. This timing is crucial because it ensures that passengers are receiving vital safety information when they are fully aware of their situation, and that it is clear that immediate safety measures must be followed. After the aircraft has stopped, the cabin crew can effectively communicate the procedures and instructions for evacuation or survival, which are essential in emergency situations like a ditching scenario.

The other choices do not align with the operational protocols typically followed in aviation safety. Making the announcement immediately after the ditching drill might not provide the necessary context or urgency that the passengers need to understand the seriousness of the situation. Similarly, stating that announcements are made only when instructed by the captain does not reflect the proactive role of cabin crew in ensuring passenger safety. Announcing the plan before take-off is also not appropriate, as the specifics of the ditching survival plan are most relevant during flight when the situation could arise. Therefore, the correct timing for the announcement is indeed after the aircraft has come to a complete stop, ensuring maximum effectiveness and clarity for the passengers.