English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

An early warning system for sensing suspicious ships approaching nuclear power plants and other important facilities located at the coast is necessary. Thus, the authors developed a buoy equipped with a marine surveillance system. In this paper, the results of actual sea experiments of prototype buoys for a two-month period from July to August in 2008 and 2009 are presented. Underwater sounds recorded with hydrophones mounted on the buoys were analyzed, and a method used to detect underwater sounds of ships approaching the buoys was evaluated. Next, the underwater sound from an experiment boat circling the buoys was observed and analyzed in order to build an algorithm for predicting the geometric direction and position of the boat as an underwater sound source. Results show that this technique can be a useful method for real-time underwater sound monitoring. The authors expect that this surveillance buoy system will be useful in predicting the presence of dubious ships or poaching boats by sensing underwater sound.

Development of Marine Surveillance Technology by Sensing Underwater Sound