What system is used to alert crew members about smoke detection in an aircraft?

The Smoke Detection System is specifically designed to detect smoke within the aircraft's environment, such as in the cargo hold or within the lavatories. This system includes various smoke detectors that continuously monitor for the presence of smoke particles in the air. When smoke is detected, the system triggers alarms and alerts the crew members, ensuring timely responses to potential fire hazards.

While options like the Fire Alarm System and Cockpit Alert System deal with indications of fire and related hazards, the Smoke Detection System is the precise term for the equipment that focuses exclusively on identifying smoke. The Emergency Notification System, while potentially useful in various scenarios, does not specifically denote a system focused on smoke detection. Thus, the Smoke Detection System is the most accurate and relevant answer for alerting crew members about smoke presence in the aircraft.