Sonobuoy data used to collect whale acoustics from ARSV Laurence M. Gould and RVIB Nathaniel B. Palmer cruises LMG0103, NBP0103, and NBP0104 in the Southern Ocean in 2001 (SOGLOBEC project)

<p><strong>Working Procedure:</strong><br />
A sonobuoy is deployed and monitored until it is out of range. The length of time the sonobuoy can be heard depends on the speed of the ship, the sonobuoy's direction relative to the ship and the prevailing sea, ice and weather conditions. When a whale is heard, an attempt is made to identify the species and note it. If a seal is heard, it is just noted as a seal. The sonobuoy was set to scuttle after 8 hours.</p>

<p><strong>Questions regarding these data should be directed to:</strong><br />
John Hildebrand<br />
Scripps Institution of Oceanography, UCSD<br />
9500 Gilman Drive<br />
La Jolla CA, 92093-0205<br />
<br />
Email: [e-mail]<br />
<br />
<em>Last Updated February 22, 2006 </em></p>