Final answer:
The 25 person raft on an A321S is stored in the floor compartments near emergency exits, designed for use in over-water evacuations.
Step-by-step explanation:
The 25 person raft found on an A321S aircraft, which is used for emergency evacuations over water, is typically located within the floor storage compartments near the emergency exits. The Airbus A321S, part of the A320 family, is a single-aisle aircraft commonly configured to maximize passenger safety.
In the event of an emergency, the flight crew will deploy the raft automatically or manually, depending on the situation, to ensure passengers can evacuate the aircraft safely. It's important for crew members and passengers alike to familiarize themselves with the safety instructions specific to their aircraft which includes the location and usage of the life rafts.