Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
In maritime transportation, the engine department or engineering department is an organizational unit aboard a ship that is responsible for the operating, maintaining and repairing the propulsion systems and the support systems for crew, passengers and cargo.
It is also responsible for repairing and maintaining other systems on ship such as:
The Engine Department emerged with the arrival of marine engines for propulsion, largely during the latter half of the 19th century. Due to the advancement in Marine Technology during the twentieth century, the engineering department is considered in merchant navy as equally important as the Deck department, since trained engineers are required to handle the machinery on a ship.
Nowadays due to the increase in Automation on Merchant Vessels and increase in the Unattended Machinery Spaces (UMS) class vessels the number of seafaring engineers have decreased drastically on board a Merchant Ship. Today the Engine department usually consists of the following number of Engineers and crew: