An underwater object was identified and divers were directed to the general location.

The timespan for underwater objects may extend back a week or more.

There are reports of a large underwater object heading South at high speed.

It can track underwater objects, similarly to an air traffic control radar.

Ospreys have vision that is well adapted to detecting underwater objects from the air.

Track history for underwater objects can extend back several weeks.

The area outside Snell's window will either be completely dark or show a reflection of underwater objects.

At night, the turtle drops to the bottom of its water body or perches on an underwater object and sleeps.

It normally floats, but can also be attached to underwater objects such as logs and rocks.

It appears that they've found an underwater object and have anchored beside a buoy.