Protocol for in-situ underwater measurement of explosive ordnance disposal for UXO

<p>This document provides guidance on best practice for in-situ measurement of underwater sound generated from underwater explosions undertaken during disposal of unexploded ordnance in the ocean. In recent years there has been an increasing need to measure and report levels of underwater sound generated by these explosions, partly driven by the need to conform to regulatory requirements with regard to assessment of the environmental impact. Attempts to report measured noise levels are sometimes difficult to compare if different methodologies and acoustic metrics are used. This good practice guide aims to provide guidance on best practice for measurement and for reporting the results using common methodology. The work to prepare this document was funded in the UK by the Department for Business, Energy and Industrial Strategy through its Offshore Strategic Environmental Assessment programme.</p>