打捞沉没于水中物体的工程作业。包括打捞船舶、飞行器、货物等。在航道、港口水域中的打捞作业，可达到清理通航障碍物的目的。也常用于石油钻井中，指采用相应的措施工具捞出井下落物的作业过程。打捞是一项综合性技术，涉及测量、潜水、水下切割、封堵、水下爆破和水下焊接等。
打捞作业者实施打捞作业时，必须在港务监督核准的作业区域内进行，并按照港务监督的要求报告有关活动情况。
Salvage operators must restrict their salvage operations within the operational areas permitted by the port authority, and report their related activities as required by the port authority.
本文导出的计算方法也可用于计算打捞作业中提升重物至水面附近时吊索的最大张力。
The method deduced in this paper can also be used to calculate the maximum tensile forces for lifting a weight nearby the water surface during the salvaging operation.
在打捞作业中所用的一种井下工具，在打捞时它与管子或工具的外表面接合。
A downhole tool used in fishing operations to engage on the outside surface of a tube or tool.
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