For a ditching emergency, which equipment is necessary for the demonstration?

In a ditching emergency, it is essential for flight attendants to demonstrate the proper use of safety equipment to ensure passenger safety. The safety information card provides crucial information about emergency procedures, including evacuation routes and the location of life jackets, while the crew life vest is an important piece of personal safety equipment that crew members must wear during a ditching scenario. Demonstrating these items helps passengers understand how to respond effectively in an emergency situation and reassures them that the crew is prepared and knowledgeable.

The other options, while they may concern safety in various emergency situations, do not fulfill the requirement for a ditching demonstration specifically. Life rafts and signaling devices are more relevant to the aftermath of a plane landing in water, not the initial passenger demonstration. A personal flotation device alone, while important, does not encompass the broader context of safety procedures that the safety information card and crew life vest provide. Fire suppression systems are not relevant in a ditching scenario, as they pertain to onboard fires rather than water emergencies. Hence, the combination of the safety information card and crew life vest is necessary for effectively preparing passengers in the event of a ditching.