The Acoustically Navigated Geological Underwater Survey (ANGUS) was a deep-towed still-camera sled operated by the Woods Hole Oceanographic Institute (WHOI) in the early 1970s.
[1] ANGUS was encased in a large 12-foot (3.7 m) steel frame designed to explore rugged volcanic terrain and able to withstand high impact collisions.
[1] On the bottom of the body was a downward-facing sonar system to monitor the sled's height above the ocean floor.
ANGUS has been used to search for and photograph underground geysers and the creatures living near them, and it was equipped with a heat sensor to alert the tether-ship when it passed over one.
Scientists nicknamed ANGUS Dope on a rope [2] due to its durability and lack of fragile sensors.