Mini Sub detects the presence of something under Lake Ontario that baffled the Army and scientists alike

The Mini Submarine

The mini-submarine AKA the ThunderFish is an automatic underwater vehicle which is operated remotely like drones. This submarine is installed with a sonar device that captures high-resolution images. Using this tech the team was able to locate the thing they were looking for.  They were able to study it with great details. The discovery they were able to make lay at the bed of the lake for the past 60 years.