A man walks from a submarine to another ship on the high seas

The footage shows a man with a bag standing on the "wing" of a submarine—a large submersible—watching as a second vessel slowly approaches. Thanks to the coordinated work of the crews, the sub occupies a nearly perfect position, and the man takes a few steps, transferring from one vessel to the other.

The scene is particularly interesting because this procedure is not standard maritime procedure: typically, vessel transfers are carried out using a lifeboat, a ladder, and under controlled conditions.