In this chapter we will discuss the human factors aspects of ship operation. Although certain functions have been automated, a ship is still largely a human-controlled system. Two key concepts are sometimes used more or less as synonyms, namely ergonomics and human factors. There is, however, a certain distinction made between the concepts in some circles, although both focus on the interaction between humans and physical work environment and machines:
. Ergonomics: Particular emphasis is put on the design of displays, controls and the workplace. The human physical dimensions (anthropometry) and their capacity with respect to sensing and control ability are especially taken into consideration. The physical aspects of the environment such as climate, noise and vibration are also a concern.