Deployment of an Autonomous Underwater Vehicle in Ice-covered Sea of Okhotsk : The First Japanese Challenge

第3回極域科学シンポジウム/第35回極域気水圏シンポジウム 11月29日（木） 国立国語研究所 ２階多目的

Bathymetry Mapping at Kuroshima Knoll with Synthenic Aperture of Interferometry Sonar

特集1 海中工学研究センタ

Exploration of NW Rota 1 Underwater Volcano by Autonomous Underwater Vehicle "r2D4"

特集1 海中工学研究センタ

R/V KIREI Cruise Report KR21-15C

調査海域: 上越沖海域, 海鷹海脚 / Area: Umitaka Kaikyaku, Jyoetsu off. ; 期間: 2021年9月5日～2021年9月16日 / Operation Period: September 5, 2021～September 16, 2021http://www.godac.jamstec.go.jp/darwin/cruise/kairei/kr21-15c/

R/V KIREI Cruise Report KR21-18C

調査海域: 相模湾 / Area: Sagami bay ; 期間: 2021年11月25日～2021年11月30日 / Operation Period: November 25, 2021～November 30, 202

Development of an autonomous underwater vehicle for survey of cobalt-rich manganese crust

AUV BOSS-A with visual and acoustic instrument device has been developed to survey manganese crusts located at the depth of 1,000 to 2,400 m. The AUV navigates at constant speed and altitude along waypoints with primary set, and automatically observes the seafloor by developed instruments. Visual instrument device mounted on the AUV creates 3D color reconstruction which shows the condition and the distribution of manganese crusts. Mounted acoustic instrument device is able to measure manganese crusts thickness. This paper describes the system and survey method of the AUV BOSS-A and survey results of sea trial for the demonstration of the manganese crust survey using the AUV. Survey results shows that manganese crusts with thickness of 15 to 45 mm are distributed at Katamaya sea mount. coustic instrument devices.</p

Autonomous underwater vehicle “BOSS-A” for acoustic and visual survey of manganese crusts

In order to effectively investigate the distribution and amount of cobalt-rich manganese crust (CRC), an autonomous underwater vehicle BOSS-A equipped with visual and acoustic instruments were developed. BOSS-A observes the seafloor along preset waypoints at a constant speed and altitude. Detailed 3D seafloor images can be obtained from the visual instrument, which employs a sheet laser and a camera. In addition, an acoustic instrument measures the CRC thickness beneath BOSS-A. The CRC at Katayama seamount was surveyed in February. The results visually presented the state and distribution of the CRC in this site and clarified the amount of the CRC. In the future, the authors will develop a more reliable thickness measurement method