Turn around in port have to be as fast as possible because the time spent in ports is very expensive. All of this adds work and stress to the crew on board which drains them of their energy which will lead to errors due to fatigue. The ILO have conventions for trying to restrict the maximum working hours on board and to determine the minimum rest period of seafarers.[27] Unfortunately, the maritime industry is so competitive and there are fewer and fewer crew members on board that it makes it difficult to not work overtime; otherwise the workers will fall behind on their work load.[28]