Good point! I was only keying off of the implied Planet of the Apes reference - sorry! I have a friend who was there when they filmed it in Lake Powell and sent me a bunch of photos. I'm shocked that they even rigged up to work in such deep waters. Either they weren't honest with their underwriters or the insurance was crazy.
Yeah. And now learning about this, especially the depth of water, has got me wondering if the actor (star? stuntman?) was nervous about being inside the floating mock-up so he could climb out the top hatch and abandon ship.
Either the spacecraft was reliably stabilized somehow, or they shot the stunt in a shallow area before moving to deep water to scuttle the thing (and what a fantastic scene). I say that because imagine being inside the prop when it might very well flood and sink, and maybe you just twisted your ankle and can't get out. In 490 feet of water, nobody can save you in time.
And things do go wrong in water scenes:
• Jaws: I think I saw this in a DVD featurette. Roy Scheider was inside Quint's boat when it sank unexpectedly, and Spielberg was worried about the mechanical shark. Scheider shouted "The ACTOR is fine!"
• The Private Life of Sherlock Holmes: A 30-foot
Loch Ness monster prop sank during filming and was lost to the depths, until it was rediscovered in 2016 by a team searching for the real creature. That must have been such a great moment.
• Star Trek IV: To portray the Pacific Ocean, they flooded a parking lot at Paramount that can double as a giant water tank. I doubt there was any danger of the Klingon ship sinking; it looked awful steady there, like it wasn't even floating. But I had to bring this back to
Star Trek somehow.