This analysis of the acoustic environments of the southern resident killer whales in Haro Strait of Puget Sound combines field measurements and acoustic propagation modeling for the frequency range 1-10 kHz.

High-frequency acoustic remote sensing offers an attractive method of detecting and probing scales of hydrothermal flow that are unattainable by point sampling methods. Two new methods are: 1) scintillation thermography to detect and characterize diffuse flow fields; and 2) plume particulate scattering to estimate flow velocity and particulate concentrations in the high temperature vent plumes.

The ALOHA/MARS mooring sensor network combines adaptive sampling methods with a moored deep-ocean sensor network.

The goals of ASIAEX program in the East China Sea were to identify and elucidate properties of shallow-water boundaries governing propagation and reverberation, such as sediment inhomogeniety, sediment roughness, and sea surface roughness, and to establish a geoacoustic description of the East China Sea seabed.

The Blue Water Acoustics Research group is a multidisciplinary team of investigators committed to solving the fundamental physical problems of oceanic acoustic propagation across ocean basins. Our inquiry is focused to maximize application to tactical and environmental monitoring systems. Includes the North Pacific Acoustic Laboratory (NPAL) and the Long-range Ocean Acoustic Propagation Experiment (LOAPEX).

The XRFS was built by APL-UW under a NASA contract from the Langley Research Center; it is designed to be deployed down a pre-drilled hole for exploration and elemental analysis of subsurface planetary regolith.

This effort is a step towards improving multi-channel digital sonar technology for implementing new processing methods and imaging applications in the ocean. The target application for this instrument is measuring acoustic scatter from weak volume fluctuation in the deep-ocean water volume

The NEPTUNE project is a linked array of undersea observatories on the Juan de Fuca plate in the northeastern Pacific Ocean. Fiber-optic power cable will connect land-based scientists, students, decision makers, and the public to distributed sensors above, on, and beneath the seafloor.

The objectives of the NPAL program are to understand the basic physics of low-frequency, long-range, broadband propagation, the effects of environmental variability on signal stability and coherence, and the fundamental limits to signal processing at long-range imposed by ocean processes.

A novel mid-frequency multibeam sonar has been developed and deployed to image fish at long ranges in shallow water environments. It exploits the affects of waveguide propagation in the ocean and can be deployed in a fixed location in conjunction with other ocean observatory platforms and instruments.

The University of Washington's Regional Scale Nodes or RSN of the NSF OOI will extend continuous high-bandwidth (tens of Gigabits/second) and power (tens of kilowatts) to a network of instruments widely distributed across, above, and below the seafloor in the northeast Pacific Ocean.

The overall objective of SAX04 is to better understand the acoustic detection at low grazing angles of objects, such as mines, buried in sandy marine sediments.