Lay out reference points and dimensions on metal or plastic stock or workpieces, such as sheets, plates, tubes, structural shapes, castings, or machine parts, for further processing. Includes shipfitters.

Compute layout dimensions, and determine and mark reference points on metal stock or workpieces for further processing, such as welding and assembly. Design and prepare templates of wood, paper, or metal. Fit and align fabricated parts to be welded or assembled. Lay out and fabricate metal structural parts such as plates, bulkheads, and frames. Locate center lines and verify template positions, using measuring instruments such as gauge blocks, height gauges, and dial indicators. Mark curves, lines, holes, dimensions, and welding symbols onto workpieces, using scribes, soapstones, punches, and hand drills. Plan and develop layouts from blueprints and templates, applying knowledge of trigonometry, design, effects of heat, and properties of metals. Plan locations and sequences of cutting, drilling, bending, rolling, punching, and welding operations, using compasses, protractors, dividers, and rules. Add dimensional details to blueprints or drawings made by other workers. Apply pigment to layout surfaces, using paint brushes. Brace parts in position within hulls or ships for riveting or welding. Inspect machined parts to verify conformance to specifications. Install doors, hatches, brackets, and clips. Lift and position workpieces in relation to surface plates, manually or with hoists, and using parallel blocks and angle plates.

Production and Processing -- Knowledge of raw materials, production processes, quality control, costs, and other techniques for maximizing the effective manufacture and distribution of goods. Design -- Knowledge of design techniques, tools, and principles involved in production of precision technical plans, blueprints, drawings, and models. Mathematics -- Knowledge of arithmetic, algebra, geometry, calculus, statistics, and their applications.

Mathematics -- Using mathematics to solve problems. Equipment Selection -- Determining the kind of tools and equipment needed to do a job. Reading Comprehension -- Understanding written sentences and paragraphs in work related documents. Quality Control Analysis -- Conducting tests and inspections of products, services, or processes to evaluate quality or performance.

Number Facility -- The ability to add, subtract, multiply, or divide quickly and correctly. Visualization -- The ability to imagine how something will look after it is moved around or when its parts are moved or rearranged. Mathematical Reasoning -- The ability to choose the right mathematical methods or formulas to solve a problem. Information Ordering -- The ability to arrange things or actions in a certain order or pattern according to a specific rule or set of rules (e.g., patterns of numbers, letters, words, pictures, mathematical operations). Near Vision -- The ability to see details at close range (within a few feet of the observer). Manual Dexterity -- The ability to quickly move your hand, your hand together with your arm, or your two hands to grasp, manipulate, or assemble objects. Deductive Reasoning -- The ability to apply general rules to specific problems to produce answers that make sense. Written Comprehension -- The ability to read and understand information and ideas presented in writing.

Drafting, Laying Out, and Specifying Technical Devices, Parts, and Equipment -- Providing documentation, detailed instructions, drawings, or specifications to tell others about how devices, parts, equipment, or structures are to be fabricated, constructed, assembled, modified, maintained, or used. Handling and Moving Objects -- Using hands and arms in handling, installing, positioning, and moving materials, and manipulating things. Getting Information -- Observing, receiving, and otherwise obtaining information from all relevant sources. Evaluating Information to Determine Compliance with Standards -- Using relevant information and individual judgment to determine whether events or processes comply with laws, regulations, or standards. Inspecting Equipment, Structures, or Material -- Inspecting equipment, structures, or materials to identify the cause of errors or other problems or defects. Controlling Machines and Processes -- Using either control mechanisms or direct physical activity to operate machines or processes (not including computers or vehicles). Performing General Physical Activities -- Performing physical activities that require considerable use of your arms and legs and moving your whole body, such as climbing, lifting, balancing, walking, stooping, and handling of materials. Estimating the Quantifiable Characteristics of Products, Events, or Information -- Estimating sizes, distances, and quantities; or determining time, costs, resources, or materials needed to perform a work activity.