Weddell Sea

The depth of the iceberg meant its bottom became lodged on the floor of the Weddell Sea, part of the Southern Ocean, where it remained static for more than 30 years.

For the first time we can see the vessel, which sank in 1915 and lies 3,000m down at the bottom of the Weddell Sea, as if the murky water has been drained away.

A standout moment on Tamara's nine-week expedition in Antarctica's Weddell Sea was when two seals bobbed up to the surface to take a deeper breath after falling asleep alongside the ship.

It broke free from the Antarctic coastline way back in 1986, but then almost immediately got stuck in the bottom-muds of the Weddell Sea.

They found that as the Weddell Sea current flowed around Maud Rise, the turbulent eddies moved salt onto the top of the sea mount.