<div class="cbp-l-inline"><img src="/explorations/10thunderbay/logs/media/sound-profile-800.jpg" alt="Clinton Johnson takes a sound velocity profile using a device that records temperature at multiple points, as it sinks to the bottom." title="Clinton Johnson"></div><div class="cbp-l-inline-below"><div class="cbp-l-inline-title"><span class="glyphicon glyphicon-picture" aria-hidden="true"></span>&nbsp;Clinton Johnson</div><div class="cbp-l-inline-subtitle"><em>Image courtesy of Thunder Bay 2010 Expedition, NOAA-OER.</em> <a href="/explorations/10thunderbay/logs/media/sound-profile-hires.jpg" download>Download larger version (jpg, 884 KB).</a></div><div class="cbp-l-inline-desc"><p>Clinton Johnson takes a sound velocity profile using a device that records temperature at multiple points, as it sinks to the bottom.</p></div><div class="cbp-l-inline-view-wrap"><a href="/explorations/10thunderbay/logs/aug18/aug18.html" class="cbp-l-inline-view">Learn more</a></div></div>