The Direct Survey Method (DSM) of underwater survey, and its application underwater

Abstract

Describes the application of an underwater survey method, the direct survey method, to underwater archaeological projects such as the Mary Rose and other wreck sites which was developed to provide a fast, simple, and accurate technique with quantifiable error, especially in limited visibility. This method is particularly useful in sites with complex three-dimensional architecture, such as insides of wrecks. It uses measurements taken from datum points directly down to the object being surveyed, eliminating the plumb line. A computer program processes the results.