One who operates adaptive control, automatic, mechanized, or robotic welding equipment.

The equipment used to perform the welding operation. For example: spot welding machine, arc welding machine, and seam welding machine.

A joining process that produces coalescence of materials by heating them to the welding temperature, with or without application of pressure or by the application of pressure alone, and with or without the use of filler metal.

To ensure that a welder possesses the necessary skils to produce a sound weld he must complete a test piece which is representative of conditions that will be encountered during production welding.

A written certification that a welder has produced welds meeting a prescribed standard of the performance.

One who performs a manual or semiautomatic welding operation.

The capacity of a material to be welded under the imposed fabrication conditions into a specific, suitably designed structure and to perform satisfactorily in the intended service.

A preferential corrosion of the weld deposit due to an electrolytic action between the weld metal and base metal.

The most common type of discontinuities are: cracks, incomplete fusion, slag inclusions, porosity, undercut. Imperfections of welding connections can be isolated or clustered.

A deep-section built-up frame which provides additional strength to the structure.

A flat plate with a flanged or stiffened edge.

A door fitted in a structure above the freeboard deck. It must be of adequate strength and able to maintain the watertight integrity of the structure.

Weathertight means that in any sea conditions water will not penetrate into the ship, (ICLL).

A deck which is completely exposed to the weather from above and from at least two sides, (SOLAS).

A device used to receive weather reports.

A depth gauge which is inserted into the stern frame boss and through the sterntube bearing to measure the wear that has occurred in the bearing.

The deterioration of a surface due to relative motion between it and another.

The maximum static angle of the heel produced by the fin, expressed in degrees

The travelling undulation of the surface of a liquid. The wave crest moves as the individual surface particles rise and fall but there is no forward motion of the liquid.

A drawing showing the main and local watertight subdivision as well as internal openings and closing devices thereof.