THIS is the moment the doomed Sindbad submarine disaster unfolds as the vessel plunges beneath the waves with the hatches still open.

Footage shows the sub beginning its dive beneath the Red Sea while tourists are still boarding it leaving them screaming in panic.

Six Russians would be killed on Thursday in the Egyptian holiday disaster – including two children.

Video caught by one of the tourists boarding the submarine shows the moment their jaunt turned into a nightmare.

Water quickly starts to rise around tourists’ feet as the craft begins to dive.

The topside Russian woman notices the rising water and remarks to her phone: “That’s it the dive has begun, we are already descending slowly.”

Panicked children then begin to scream as the submarine descends fast and within seconds the holidaymakers are left swimming for their lives.

The phone is in the water for several seconds before it cuts out.

The hatch of the craft can still be seen open in the clip, suggesting that seawater would have rushed into the vessel.

It’s not know how many people were already aboard the submarine but 29 were pulled from the shark-infested waters.

Six people died while 39 were miraculously rescued after the Sindbad pleasure submarine sank off the Egyptian resort city of Hurghada.

Nine other people were injured in the disaster, including four said to have been critically hurt.

The crew of the sub are now being questioned by Egyptian officials.

Red Sea Governor Amr Hanafy confirmed yesterday the submarine had a valid licence and the crew had all obtained the correct certificates.

One survivor had claimed the vessel submerged with its hatches still open which allowed water to quickly flood in.

The Russian survivor – who escaped the horror with her husband – said: “Some managed to swim out, some didn’t”.

Some of those who escaped were able to climb through the open holes to safety.

The first victim was named yesterday as a Russian doctor anaesthetist Ravil Valiullin, 40.

Most of the tourists were Russians, but there were also some from India, Norway and Sweden, officials said. There were also five Egyptians on board.

Holidaymakers have left eerie reviews of the Sindbad submarine tour just months before a survivor said staff forgot to close the hatch.

In a Tripadvisor review from a holiday in October, ‘stubbyd’ from Bridgend said: “they also ‘big up’ the qualifications of the captain.

“But constantly bumping the sub on the sea floor is not good for the sea life, sea floor, my sanity of ultimately I’d say the sub!”

The pleasure sub was operated by Sindbad Submarines which takes tourists up to 85 feet below the balmy waters of the Red Sea for 40 minutes.

An adult ticket costs £53 while a child’s ticket costs £25 for the three-hour journey which includes a boat ride out to the waiting to submersible.

Those on board will get to enjoy seeing coral and fish as well as a show performed by divers outside the boat.

Hurghada is a popular tourist destination for Brits and Germans and a number of nautical jaunts operate from the resort.