What is a common method of fire detection on ships?

Smoke detectors and heat sensors are widely used for fire detection on ships due to their effectiveness in identifying early signs of fire. Smoke detectors sense the presence of smoke particles in the air, which can indicate combustion in its early stages. They are particularly useful in areas where smoke may accumulate before flames become visible.

Heat sensors, on the other hand, detect a rise in temperature, which typically occurs when a fire starts. By combining both technologies, ships can ensure a comprehensive approach to fire detection, enabling crew members to respond swiftly to potential fire hazards. This capability is critical in the confined and potentially hazardous environments found aboard ships, where early detection can significantly reduce the risk of fire spread and enhance the safety of the vessel and crew.

In contrast, the other options, while related to fire detection, do not provide the same level of coverage or reliability as smoke detectors and heat sensors when it comes to early warning in various environments typically encountered on a ship.