On June 18, 2023, a Titanic submersible bringing five individuals to the Titanic debris site vanished in the North Atlantic Ocean.
A support ship named the Polar Prince lost communication with the ship about an hour and a half into its descent.
A small watercraft called a submersible is primarily intended for study and exploration.
In comparison to a submarine, a submersible is restricted in its ability to move and the amount of time it can spend submerged.
In contrast to a submarine, which has enough power to depart and return to port on its own, this vessel requires a mother ship that can launch and recover it underwater.