PSSR Task 9.1.A

Describe the effects of fatigue on seafarers

MMA Method

In order to satisfy NVIC 08-14 Task 9.1.A , MMA students must:

NVIC Method

See NVIC method.

STCW Competence Knowledge, Understanding, and Proficiency

Understand and take necessary actions to control fatigue

PSSR-X6 Importance of obtaining the necessary rest

Effects of sleep, schedules, and the circadian rhythm on fatigue

Effects of physical stressors on seafarers

Effects of environmental stressors in and outside the ship and their impact on seafarers

Effects of schedule changes on seafarer fatigue

Condition Behavior Standard

When asked to describe the effects of fatigue and how to control them,

The candidate describes the effects of fatigue on seafarers and how actions might be controlled to ensure safe performance of duties and responsibilities.


The candidate states (or selects the answer that states) the following:

  1. Importance of obtaining the necessary rest;
  2. Effects of sleep, watch schedules, and the circadian rhythm;
  3. Physical and environmental stressors;
  4. Diet, exercise and medications/supplements; and
  5. Schedule changes on seafarer fatigue.