Deep NINJA: A new float for deep ocean observation developed in Japan

T. Kobayashi, K. Amaike, K. Watanabe, T. Ino, K. Asakawa, T. Suga, T. Kawano, T. Hyakudome

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

We will introduce a new profiling float for deep ocean, Deep NINJA, which has been developed by Tsurumi Seiki Co. Ltd. and JAMSTEC. A prototype is designed to observe the deep ocean up to 4000m depth. It adopts the Iridium system which enables the two-way communication in a short time. Float locations at the sea surface are fixed by GPS. Its aluminum-alloy hull realized the float size of about 200 cm in height (with antenna) and about 75 kg in air weight. Lithium batteries are loaded and it is estimated to measure totally 100 ocean profiles. Now we are considering that its size be reduced for easier operation on board. One of the key devises of Deep NINJA is the buoyancy engine, which is a hybrid of the single-stroke piston and the hydraulic pump. The engine was tested at up to 4500-dbar well in the laboratory and it can generate significant buoyancy to raise the float to the sea surface everywhere. Recently the prototype was just built up and the first dive to deep ocean will be planed in 2011 summer after several test in coastal regions.

Original languageEnglish
Title of host publication2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11
DOIs
Publication statusPublished - 2011 Jun 23
Externally publishedYes
Event2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11 - Tokyo, Japan
Duration: 2011 Apr 52011 Apr 8

Publication series

Name2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11

Other

Other2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11
Country/TerritoryJapan
CityTokyo
Period11/4/511/4/8

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Ocean Engineering

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