Hot Water
Hot water released into cold lake water. In this case acoustics picked up a flow that was invisible optically. Acoustic returns were due to difference in water temperature and possibly micro-bubbles in the hot flow.
Hot water released into cold lake water. In this case acoustics picked up a flow that was invisible optically. Acoustic returns were due to difference in water temperature and possibly micro-bubbles in the hot flow.
THIS IMAGE WAS CAPTURED BY OR FEATURES A DIDSON™