Since 2014, the conservation staff at Clemson University's Warren Lasch Conservation Center in Charleston, South Carolina have been removing the concretion from the hull of H. L. Hunley, an American Civil War submarine lost 1864. In parallel, the archaeological team has been documenting the condition of the hull, the concretion layers, and the hull features revealed by the deconcretion process. This involved photography, direct measurements, and 3D scanning. This article will discuss the strategy for recording the concretion, the techniques used to document the newly revealed hull and its unique features, and the preliminary analysis of their archaeological significance.

中文翻译：

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HL Hunley揭露：1864年以来美国内战潜艇的调查记录，减缩和最新进展

自2014年以来，克莱姆森大学位于南卡罗来纳州查尔斯顿的沃伦·拉施自然保护中心的保护人员一直在从HL洪利（一艘于1864年失踪的美国内战潜艇）的船体中清除凝结物。与此同时，考古小组一直在记录该物种的状况。清除过程中显示的船体，固结层和船体特征。这涉及摄影，直接测量和3D扫描。本文将讨论固结物的记录策略，用于记录新发现的船体及其独特特征的技术，以及对其考古学意义的初步分析。