Review of underwater acoustic propagation models.

In September 2013, the European Commission commissioned a project entitled Impacts of Noise and use of Propagation Models to Predict the Recipient Side of Noise (project number 1109.05/659011/SER/C.2), under a Framework Service Contract (ENV.D2/FRA/2012/0025) with the subject `Emerging pressures, human activities and measures in the marine environment (including marine litter), led by Cefas. The project consortium members include Cefas, NPL, TNO, OASIS and JNCC (later in an advisory role). This report is the deliverable of Task 4, `Compile existing information on underwater sound propagation models', of the above project, its aim being `to critically review existing relevant literature and results from research projects and make an inventory of existing models with pros/cons and gaps, and especially the reliability and information needs required for applying these models, with assumptions and limitation explicitly mentioned. This report is the unrestricted version of the original draft submitted to the EC in July 2014. No other edits were requested.