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Acoustic and visual survey of manganese crusts using an underwater vehicle at #5 Takuyo seamount

Acoustic and visual survey of manganese crusts using an underwater vehicle at #5 Takuyo seamount
Acoustic and visual survey of manganese crusts using an underwater vehicle at #5 Takuyo seamount

This paper describes acoustic and visual instruments developed to perform high resolution surveys of manganese crusts. The instruments consist of an acoustic device developed to perform in situ measurements of manganese crust thickness at depths of up to 3000m, and a vision based mapping system that generates three-dimensional colour reconstructions of the sea floor. The developed systems operate at low altitudes, using an underwater platform such as an autonomous underwater vehicle (AUV) or remotely operated vehicle (ROV) to maintain a close range to the sea floor. In this communication, the authors describe the acoustic probe and vision based mapping system together with the algorithms that have been implemented to process the data they obtain, and present some results from sea trials performed using the ROV Hyper-Dolphin of JAMSTEC during the NT1011 cruise of the R/V Natsushima at #5 Takuyo seamount. During the survey, the ROV was operated at depths of between 1000 and 3000 m at low altitudes of <1.0m, with surge velocities of between 0.4 to 0.6 knots to survey the area both acoustically and visually. The results are the first time in situ measurements of manganese crust thickness have been uccessfully performed, and demonstrate that the proposed instruments are useful tools to enable more efficient surveys of manganese crusts.

41-46
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Bodenmann, Adrian
070a668f-cc2f-402a-844e-cdf207b24f50
Asada, Akira
76e2e5fe-718d-4cdc-a708-4bf1112d8b0a
Ura, Tamaki
689db479-1520-4f32-bb7a-ed34b26b921f
Sangekar, Mehul
196e042f-c144-4310-aab1-1b8e963ac417
Ohira, Katsumi
b1363824-d49d-4f84-9bfc-d8213b65b751
Kirimura, Daigo
edf8fc88-a2c1-4256-91d5-ce3007ac499d
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Bodenmann, Adrian
070a668f-cc2f-402a-844e-cdf207b24f50
Asada, Akira
76e2e5fe-718d-4cdc-a708-4bf1112d8b0a
Ura, Tamaki
689db479-1520-4f32-bb7a-ed34b26b921f
Sangekar, Mehul
196e042f-c144-4310-aab1-1b8e963ac417
Ohira, Katsumi
b1363824-d49d-4f84-9bfc-d8213b65b751
Kirimura, Daigo
edf8fc88-a2c1-4256-91d5-ce3007ac499d

Thornton, Blair, Bodenmann, Adrian, Asada, Akira, Ura, Tamaki, Sangekar, Mehul, Ohira, Katsumi and Kirimura, Daigo (2011) Acoustic and visual survey of manganese crusts using an underwater vehicle at #5 Takuyo seamount. In 2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11. vol. 53, pp. 41-46 . (doi:10.1109/UT.2011.5774098).

Record type: Conference or Workshop Item (Paper)

Abstract

This paper describes acoustic and visual instruments developed to perform high resolution surveys of manganese crusts. The instruments consist of an acoustic device developed to perform in situ measurements of manganese crust thickness at depths of up to 3000m, and a vision based mapping system that generates three-dimensional colour reconstructions of the sea floor. The developed systems operate at low altitudes, using an underwater platform such as an autonomous underwater vehicle (AUV) or remotely operated vehicle (ROV) to maintain a close range to the sea floor. In this communication, the authors describe the acoustic probe and vision based mapping system together with the algorithms that have been implemented to process the data they obtain, and present some results from sea trials performed using the ROV Hyper-Dolphin of JAMSTEC during the NT1011 cruise of the R/V Natsushima at #5 Takuyo seamount. During the survey, the ROV was operated at depths of between 1000 and 3000 m at low altitudes of <1.0m, with surge velocities of between 0.4 to 0.6 knots to survey the area both acoustically and visually. The results are the first time in situ measurements of manganese crust thickness have been uccessfully performed, and demonstrate that the proposed instruments are useful tools to enable more efficient surveys of manganese crusts.

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More information

e-pub ahead of print date: 5 April 2011
Published date: 27 May 2011
Venue - Dates: 2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11, Tokyo, Japan, 2011-04-05 - 2011-04-08

Identifiers

Local EPrints ID: 434066
URI: http://eprints.soton.ac.uk/id/eprint/434066
PURE UUID: c920e2a5-7419-4c5d-87c5-a5843aecaabc

Catalogue record

Date deposited: 11 Sep 2019 16:30
Last modified: 11 Sep 2019 16:30

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