Which symptom indicates decreased performance due to fatigue?

The presence of decreased concern for safety is a significant indicator of reduced performance due to fatigue. When an individual is fatigued, their cognitive functions and decision-making abilities can deteriorate, leading to a lack of awareness about potential hazards. This can result in a complacent attitude toward safety and the risks involved in tasks, which might otherwise be approached with greater caution and focus.

In stressful or demanding situations, fatigue often clouds judgment, leading people to overlook essential safety measures or to take unnecessary risks. This symptom can compromise the safety of both the individual and their crew, making it critical for boat crew members to recognize and address fatigue early on to maintain operational safety.

In contrast, heightened awareness, increased social interaction, and improved focus are typically associated with alertness and engagement, which are opposite effects of fatigue. Therefore, recognizing decreased concern for safety as a symptom of fatigue is essential for ensuring that crew members operate safely and effectively.