As a wiper aboard a
United States Merchant Marine vessel or any
International Maritime Organization (IMO) certified merchant shipping vessel, the diversity of operational duties is inherent and must be approached as such. Typically, with little experience, a wiper may work under the close supervision of trained and qualified engineers of the engineering department belonging to the vessel. Taking commands and directions from the 1st Assistant Engineer, the
Chief Engineers’ foremost subordinate, the wiper is in charge of, but not wholly responsible for, maintenance ranging from chipping in the bilges to painting of the overhead in the machinery spaces. Additional duties include assisting of licensed engineers, filling in for
Qualified Members of the Engine Department (QMED) when necessary, and standing as a member of the watch team but not assigned watches. Duties while serving day work, typically while in port or underway, involve cleaning and degreasing of equipment, greasing of parts, and oversight of all machinery spaces in terms of cleanness. The wiper position is the lowest-ranking unlicensed position in the engineering department. The wiper position is designated for apprentices to the engineering department where a basic working knowledge of plant layout is learned. Work to be performed by a wiper is typically of low-stakes nature and is meant to create a work-positive environment where sea time may be secured towards licensure. As the typical wiper is aboard a vessel and underway, although they may be found in land-based operations such as railroading as well, they must be fluent in ship operations and have familiarity with safety equipment used. As the United States Merchant Marine is strict in compliance of international organization's precedent in regards to regulations on shipping, having to adhere to the standards set by the IMO, many of the same requirements can be found for vessels that do not serve under the United States
Jones Act. In relation to this requirement, a wiper is to be sufficiently trained on how to carry out firefighting operations; this includes the proper donning, assembly, use, and maintenance of all equipment involved should the need arise in order to facilitate the need for all seafarers to be fluent in lifesaving procedures. These requirements are mandatory and are also adhered to on an international and involuntary basis with the need to renew the same preliminary physical and firefighting examinations found within CFR 46. The global institution responsible for mandating standards for lifesaving procedures and equipment is commonly known as the International Convention for the
Safety of Life At Sea (SOLAS). == General qualifications ==