Good evening tonight on 360 more sounds from under the sea is the race to find the Titan

submersible grows more urgent by the hour.

I'll also show you what it's like inside the Titan and talks to someone who raised

doubts about its safety.

An exclusive CNN reporting from the front lines in Ukraine showing just how difficult the

counteroffensive underway has been.

Good evening we begin tonight with the most urgent deadline there is.

For the five people you see here aboard the Ocean Gate Titan submersible, missing somewhere

in the North Atlantic on the way to the wreck of the Titanic.

British businessman Hamish Harding, British Pakistani businessman Shazada Dauwud and his

teenage son Suleiman, French maritime explorer Paul Henri, Norge-Ole, and Ocean Gate Founder

stocked in rush.

They are now the subject of a multi-nate national search involving military and civilian ships,

aircraft and expertise which grew larger in size and capability today.

The question is is it enough and do they have time?

This is a new video from a Canadian Air Force plane normally used to hunt military subs.

The entire effort is running on hope that underwater sounds which were heard again today are

coming from the Titan.

But it's also running up against the subliminated oxygen supply and the possibility that

locating a vessel the size of a large car in an area twice the size of Connecticut will

simply take more time than they have.

As Jason Carroll was in Boston for a night where some of the Coast Guard's searchers

...