Offshore drilling and constructions require exact knowledge of the
geophysical properties of the seabed and sub-seabed, as unexpected
objects can slow down or halt projects. This book presents the
state-of-the-art in acoustic exploration of the seabed and sub-seabed,
from initial designs in the 1980s to commercial contracting and
operation of the Acoustic Corer(TM) in the last decade. The Acoustic
Corer(TM) is a high-definition commercial acoustic sub-bottom imaging
system, producing an "acoustic core" within which sub-seabed sedimentary
characteristics and discrete buried objects larger than 0.5 m can be
identified and mapped. It makes use of the innovative JYG-cross design,
inspired by seismic reflection and uses Synthetic Aperture Sonar (SAS)
multi-angle scattering in and within the seabed to deliver unprecedented
imagery. This book was written by the inventor of these concepts, a
known specialist in seabed acoustics, with help from an experienced
academic and author. It is intended first and foremost as a "how-to"
guide for offshore industries looking at techniques to make the
installation of different types of structures safe and efficient.