Deep sea rescues have a mixed track record. The Pisces III is one that succeeded

The clock is ticking in the all-hands-on-deck search for the tourist submersible that went missing during a deep-sea dive to the Titanic shipwreck on Sunday.

The vessel has five people on board and, according to the U.S. Coast Guard, a dwindling oxygen supply of 40 hours.

That gives responders just two days to locate the Titan — which is believed to be hundreds of miles from the nearest coast and potentially thousands of feet below sea level — plus bring it back to the surface to rescue those inside.

It's a complex mission, with retired U.S. Navy submarine Capt. David Marquet putting the odds of passengers' survival at "about 1 percent."

And it's certainly not the first of its kind: There have been several prominent rescue missions for both submarines and submersibles (which are not fully autonomous) over the course of the last century.

The ever accomplished, officially, was that of the commercial submarine Pisces III,