wizard_of_gore

Factual error: When Bond and Amasova are on the speed boat going to see Stromberg, the underwater lair is super-imposed on the horizon, rather than midway. This would make the lair around 50 miles high.

wizard_of_gore

Revealing mistake: When the boat blasts out of Stromberg's lair and lands in the water, it's obviously a miniature and the people inside are obviously dummies.

wizard_of_gore

Deliberate mistake: As the Lotus drives off the pier and enters the water, the exposed underbody is that of a normal car. After it enters the sea, the underbody we see is completely sealed, which it needs to be to allow the car to submerge.

wizard_of_gore