In the case of seafarers, among the most commonly recognized and documented causes of
fatigue are poor quality of rest, excessive workload, noise and interpersonal relationships. The
contributory factors that lead to the above are many and varied. The significance of these factors
as contributory causes of fatigue will vary depending on operational circumstances. Some
factors will be more manageable than others. Such factors can be grouped as follows:
Management ashore and aboard ship, and responsibilities of Administrations:
- scheduling of work and rest periods;
- manning levels;
- assignment of duties;
- shore-ship-shore support and communication;
- standardization of work procedures;
- voyage planning;
- watchkeeping practices;
- management policy;
- in-port operations;
- recreational facilities;
- administrative duties.
- level of automation;
- reliability of equipment;
- motion characteristics;
- vibration, heat and noise levels;
- quality of working and living environment;
- cargo characteristics/requirements;
- ship design.
- thoroughness of training;
- crew composition - cohesiveness;
- crew competency and quality.
External environmental factors:
- port conditions;
- ice conditions;
- density of vessel traffic.