JOURNAL OF COMMUNICATIONS (JCM)
ISSN : 1796-2021
Volume : 3    Issue : 5    Date : October 2008

Developing a Water Temperature Observation Network based on a Ubiquitous Buoy System to
Support Aquacultures
Masaaki Wada, Katsumori Hatanaka, and Masashi Toda
Page(s): 2-11
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Abstract
The authors have been working on the support of the fishery industry using the information and
communication technology. A water temperature observation network is proposed for supporting
aquacultures, and a ubiquitous buoy system developed for this purpose is described. The
ubiquitous buoy system was created by leveraging ubiquitous sensing technology with water
temperature observation buoys that can be executed for $1,000, a figure designed to meet the
demands of scallop cultivation fishermen. Since there are no base stations and gateways in marine
environments, we selected mobile phones for the Internet connection to send the water temperature
data by email. The ubiquitous buoys developed are light weight and of a compact design, and can
be easily installed in marine fishery environments. Furthermore, the economic cost allows the
buoys to be used in multiple point observation systems. Consequently, not only does the system
allow water temperature observations in real time, but it can also be used in future applications to
build water temperature observation networks using multiple ubiquitous buoys that share water
temperature data and allow analysis of multipoint, multi-layer water temperature data, and thus
facilitate efforts to visualize the makeup of water temperature distributions below the surface. Forty
ubiquitous buoys have been placed in scallop cultivation regions along the coast of Hokkaido, and
the water temperature data is starting to be used.

Index Terms
Sensor Network System, Buoy, Aquaculture, Low-Power Sensor Node, Mobile Phone