A pure oval shape, with this cyclops-like eye, or turret, on top. I'd estimate its diameter at 300 feet. No discernible orifices.
17 seconds sound clip from the The Atomic Submarine movie soundboard.
You can hear this line at 00:30:18 in the DVD version of the movie.
Quote context
[...]
- Speed, about 22 knots. Course, due north.
- Are you two flounders about set?
- Now, try and remember, you're not going out to rehearse a water ballet. We need a damage report.
- I never should have volunteered. If I had enough sense, I would have...
- Hey look out for the sharks, huh?
- Just musing about our one-eyed adversary, and the Homer legend.
- The Cyclopes were the sons of heaven, who forged the thunderbolts thrown by Zeus.
- Our own Cyclops throws quite a thunderbolt itself.
- I knew there was something familiar. Take a look.
- Unidentified Flying Objects.
[...]