This video details remote sensing using a side scan sonar system. As part of this system, transducers are housed in a towfish, usually towed near the seafloor, to transmit sound pulses directed sideways, rather than straight down. Video courtesy of Exploring the Submerged New World 2009 Expedition.

 

Related Links

Exploring the Submerged New World

Exploring the Submerged New World: July 25 Log

NOAA Ocean Explorer Gallery