20,000 Leagues Under the Sea (1997 Hallmark film) produced by Hallmark Entertainment. 20,000 Leagues Under the Sea (1997 Hallmark film) 20,000 Leagues Under the Sea is a 1997 television film directed by Michael Anderson and starring Ben Cross as Captain Nemo. It premiered on March 23, 1997. Based on the novel of the same name by Jules Verne, it is most notable for replacing the character of Professor Aronnax's manservant, Conseil, with the Professor's daughter, Sophie, who disguises herself as a boy so that she may accompany her father aboard the USS "Abraham Lincoln"; she becomes the apex of a love triangle involving Captain Nemo and Ned the
Twenty Thousand Leagues Under the Sea of underwater breathing apparatus designed by Benoit Rouquayrol and Auguste Denayrouze in 1865. They designed a diving set with a backpack spherical air tank that supplied air through the first known demand regulator. The diver still walked on the seabed and did not swim. This set was called an "aérophore" (Greek for "air-carrier"). Air pressure tanks made with the technology of the time could only hold 30 atmospheres, and the diver had to be surface supplied; the tank was for bailout. The durations of 6 to 8 hours on a tankful without external supply recorded for the Rouquayrol set in