Timeline reveals missing Titanic sub’s last known movements after it vanished less than two hours into its dive

A SUBMARINE with five people on board - including a British billionaire - vanished as it headed to view the wreckage of the Titanic.

Now rescuers are in a race against time to locate the vessel - which has just 72 hours of oxygen left on board.

Rescue crews are frantically searching the Atlantic Ocean after the £200,000-a-head voyage disappeared while heading to the wreckage of the Titanic.

It's believed Brit billionaire Hamish Harding, French diving expert Paul-Henry Nargeolet and submarine boss Stockton Rush are among those missing.

We take a look at exactly how the incident has unfolded in local time in Newfoundland, Canada.

7pm Saturday

On Saturday evening, billionaire businessman Hamish Harding excitedly posted on social media about the expedition ahead.

He also mentioned the poor window conditions the crew had been facing.

He wrote: "Due to the worst winter in Newfoundland in 40 years, this mission is likely to be the first and only manned mission to the Titanic in 2023.

"A weather window has just opened up and we are going to attempt a dive tomorrow."

"We started steaming from St. Johns, Newfoundland, Canada yesterday and are planning to start dive operations around 4am tomorrow morning.

"Until then we have a lot of preparations and briefings to do."

4am Sunday

It's understood the sub set sail from St John's in Newfoundland at 4am on Sunday, based on Hamish's post on Facebook.

St John’s is around 370 miles (600km) from the Titanic wreckage site.

5.45am Sunday

Just one hour and 45 minutes into the expedition the submarine lost contact with its transport vessel - the Polar Prince, according to the US Coast Guard.

The company previously revealed it uses Elon Musk's Starlink to communicate with the vessel, however it's not clear what has gone wrong with the network.

What we know:

• Frantic rescue mission to find the missing Titan submarine which vanished while exploring the Titanic
• US Coast Guard fear sub only has enough oxygen to last until 12pm on Thursday
• Five people on board the submarine have all been named - including Brit billionaire Hamish Harding
• OceanGate boss Stockton Rush, French sub-pilot Paul-Henry Nargeolet, businessman Shahzada Dawood and his son Sulaiman are the missing crew
• Ships and planes combing the area around the wreck using sonar to find the sub
• US and Canada leading rescue mission with UK teams on standby to join hunt
• Fears the tourist submarine could be "tangled" in the wreckage of the Titanic
• Pal of Hamish reveals his final text message talking about bad weather ahead of the mission
• Timeline reveals the last movements of the Titan before she went dark

3.15pm Sunday

The final picture of the sub above water was posted on Sunday afternoon.

Snaps posted on Hamish’s business’s Twitter show the vessel in foggy and wet weather being taken out by two dinghies on a barge.