On this F.G.P. (final grade project), I look to achieve the full understanding of all of the elements that play a role on a steam plant of a standard oil tanker ship of Suezmax size . My motivation in this project is inspired by the field of the marine engineering industry. Becoming a marine engineer implies the correct understanding, maintenance, and operation of the fuel oil, diesel oil, compressed air, fresh water, seawater, and steam systems, among others. With this project I intend to go further from the common knowledge of a marine engineer into one of these systems. During this project I will be analysing the steam plant of an existing vessel, going into detail on all of the components, and the plant’s operation. Alternatives will be proposed for each component and functionality will be put in question.