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U.S. Naval Research Laboratory photographs posted on this website are considered public domain and have been cleared for release.  They are available for use, subject to specific guidelines. If you would like to republish please give the photographer appropriate credit or credit the appropriate designated source.
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The U.S. Naval Research Laboratory-built Billboard Array is an acoustics instrument equipped with 64 receiver elements. It differentiates and amplifies sounds from different directions. The array provided remarkable acoustic data under both seasonal oceanographic and sea ice conditions during the multi-institutional Canadian Basin Acoustic Prorogation Experiment (CANAPE) in the Beaufort and Chukchi seas.

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Photo by: Daniel Parry |  VIRIN: 200219-N-NO204-003.JPG