Ark of Time (1997)

It is the summer of 1997 and somewhere in the Atlantic Ocean a historic event is about to occur. A ragtag team of four intrepid explorers descend to the depths of the ocean in their search to locate and enter the mythological, sunken city of Atlantis. However, something has gone wrong. Four days after the team's last communication, in a frazzled editor's office high above the streets of London, Richard Kendall, our hero, is informed of their disappearance.