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