Date Added: Aug 2009
In the offshore engineering community, deep underwater construction activities such as installation of mooring systems for oil and gas extraction require payloads such as subsea templates, Christmas trees and manifolds to be installed accurately. In this paper, the authors consider a recently proposed Underwater Positioning System (UPS) to support deepwater installations. They identify and demonstrate its shortcomings in harsh underwater acoustic channels. They then propose enhancements to UPS, and demonstrate numerically that their proposed scheme achieves significantly better localization speed, at lower communication costs while preserving the "Silent" property with a relatively small underwater acoustic sensor network deployed on the seabed in typically underwater channel conditions.