The Titanic set sail on 10 April 1912 on its voyage from Southampton, UK, to New York City, and four days later, at midnight on 14 April 1912, collided with an iceberg and sank in the North Atlantic Ocean. Now the news of the disappearance of a submarine has come out around this.

Rescuers are scrambling to find a submarine that took tourists to the site of the sinking of the Titanic. The Titanic went missing less than two hours after diving on Sunday. The submarine has the ability to stay underwater for 96 hours and has 70 hours of oxygen left in it.

US$250,000 has been taken per person for the Oceangate campaign. The company that offered an eight-day mission to the wreckage of the Titanic has confirmed that the submarine is lost at sea along with its crew members. The company said in a statement that it was exploring all options to bring back the crew safely.

The submarine has the capacity to carry five members to visit the remains of the Titanic ship. One of the passengers has been identified as British businessman Hamish Harding. Harding, 58, is an aviator, space tourist and chairman of Dubai-based Action Aviation. Harding said in an Instagram post on Sunday that she was proud to join the OceanGate campaign of their RMS Titanic mission as a mission specialist on the sinking of the Titanic. Hamish Harding is the same person who collaborated with the Indian government in the project to bring cheetahs from Namibia. Harding is known for his exploratory expeditions around the world.

Media reports suggest that another tourist is British-Pakistani businessman Shahzada Dawood and his son Suleman. His family was quoted in the media as saying "We are deeply grateful for the concern shown by our colleagues and friends and would like to request everyone to pray for his safety." Prince Dawood is the vice-chairman of one of Pakistan's largest conglomerates, Agro Corporation, with investments in fertilisers, vehicle manufacturing, energy and digital technologies. He lives in the UK with his wife and two children, according to the website of SETI, a California-based research institute of which he is a trustee.

According to media reports, Stockton Rush, founder and chief executive officer (CEO) of Oceangate, and French pilot Paul-Henri Nargolet are also aboard the submarine.

The submersible weighs 10,432 kg and can go to a depth of 13,100 feet, according to the company's website.