... underwater to predefined seabed locations. Once the units land on the seafloor, they acquire and store seismic data, employing four sensors, namely one hydrophone and three geophone components. After recording seismic wavefields from a source vessel, the AUVs autonomously navigate to a collection basket...

... of these hydrophones enabled the bottom properties to be measured considerably more accurately than is normally possible in water-covered areas. Marked anisotropie effects in the rock bottom were found by the surveys. INTRODUCTION DUaI~G the summer of 1959 a series of high resolution acoustic refraction profiles were...

... Acoustics , Symposium on Underwater Acoustics at Halifax, Nova Scotia, Plenum Publishing, 1986). “Effects of Seismic Shooting on Catch Availability of Cod and Haddock” by Engas et al. (Institute of Marine Research, Norway, 1993). Review of the Effects of Underwater Sound Generated by Seismic Surveys...

... updates from a USBL (ultra-short baseline) acoustic navigation system interfaced to a survey-quality DGPS. Two motion reference units record the AUV heave, pitch, roll, and heading information. Corresponding author: [email protected] Copyright © 2006 Society of Exploration Geophysicists...

... geological data and an analyzer program that analyzes the geological data A method of locking geological data, such as acoustic well bore logging information, and an analyzer program that analyzes the geological data commences with a generation of a first key. This first key is associated with both...

... to linear filtering and prediction problems : Transactions of the ASME, Series D: Journal of Basic Engineering , 82 , 35–45 , doi: 10.1115/1.3662552 . JBAEAI 0021-9223 Kinsey J. C. Eustice R. M. Whitcomb L. L. , 2006 , A survey of underwater vehicle navigation: Recent advances...

...-dimensional data sets to be collected in a short time in deep water over rugged terrain. Complex seafloor structures are revealed in the survey area. These seafloor structures include a graben fault zone, rugged escarpment faces, slump deposits, and erosional furrows. Geological morphologies occurring...

... states are developed and demonstrated by NIOT. In order to carry out calibration of the underwater acoustic systems the acoustic test facility (ATF) is established in NIOT. The hyperbaric test facility is extensively used to qualify the deep ocean systems for external pressures up to 900 bar ( Fig.18...

..., and the measured rotational position is used to control the angular position of the control members, and thus the lateral and vertical displacement of the streamer. 20080008032 INVENTOR: Welker, Kenneth E.; PUBLICATION DATE: January 10, 2008 Underwater acoustic positioning methods and systems based...

... on the mother ship. Photomosaics are essential when highly detailed mapping of benthic habitats or geologic features is required. To obtain the positioning accuracy required for AUV surveys, positioning is done using a combination of tools. The primary positioning system is an inertial navigation system...

... to be a high productivity remote-sensing method important for surveys over large areas. Within the “Underwater Sulfurous Seeps from Mangalia” site the sea bottom was segmented into areas assigned to one of three acoustic facies corresponding to different lithologies associated later to benthic habitats...

... vibratory sources for marine seismic surveying. An embodiment discloses a linear actuator for acoustic sources, comprising: magnetic circuitry comprising a gap; and a coil assembly comprising: a drive coil, wherein at least a first portion of the drive coil is configured to be moved in a linear path...

... tow vessels and one or more source-streamer tow vessels to acquire a wide- and/or full-azimuth seismic survey without need for the spread to repeat a path once traversed. Another method and system allows surveying a subsea geologic feature using a marine seismic spread, the spread smartly negotiating...

... in this study. Locations of the presumed earthquakes are those published by the Geological Survey of Denmark and Greenland. Locations of the August 2019 undersea mine detonations in the Fehmarnbelt Nature Conservation Area (bounded by the red line) published by the Geological Survey of Denmark and Greenland...

.... Micro-OBE was thus verified as providing a low cost, compact size, and high operational efficiency. 10 5 2016 27 12 2016 12 5 2016 2017 Society of Exploration Geophysicists electromagnetics hydrates acquisition magnetotelluric marine China Geological Survey...

... for communication, prey location, predator detection, navigation, and echolocation, so prolonged exposure to continuous sound is potentially harmful. Each survey area is divided into zones with the source positioned at the center of that area, if the exact location is known at the time of modeling ( Figure 1...

... DATE: November 1, 2011 System and method for towing acoustic source arrays A technique facilitates the production of acoustic pulses used in marine seismic surveys. A source array system comprises a plurality of acoustic sources suspended from a float in a plurality of layers positioned...

..., 2010 Performing quality control with respect to positioning of survey hardware To perform quality control with respect to positioning of survey hardware, survey navigation data is acquired regarding components of the survey hardware used to perform a survey operation with respect...

... license. Geological exploration of Mars relies on remotely operated vehicles (ROVs) equipped with robotic instrumentation (e.g., Squyres et al., 2009 ). Similar technological advances are lagging in underwater geological exploration. Geological studies in the deep ocean (below the depth range...

... Research Company; ISSUE DATE: May 22, 2012 Classifying potential hydrocarbon reservoirs using electromagnetic survey information A probabilistic method for classifying observed CSEM response for a resistive anomaly to classify the response into multiple geologic categories indicative of hydrocarbon...