I. Introduction
There is a growing importance of measuring burial depths and composition of shallow-buried maritime archaeological material using non-invasive methods. Current acoustic methods have either practical limitations for in-situ management purposes, or measurement confidence estimates have yet to be established. This paper presents the progressive results of program of in-situ experimental and wrecksite survey measurements using non-linear sub-bottom profiler (SBP) acoustic technology. The purpose of this research is to quantify estimates of accuracy, precision and Type II measurement errors of depth of sediment cover for shallow (<0.5 m) buried archaeological material and to investigate relationships between acoustic waveform parameters and types and condition of buried material.