Fun fact: I knew one of he scientists on the cover mission for the Glomar Explorer.

He was on the ship for the duration of the mission. And didn't even realise the true purpose until he read about it in the news.

Something to keep in mind if you're getting assurances from people working at or for a project or organisation that there's nothing twisted going on -- first, it needn't be a laargee operation that is, and even a full second crew and submarine-sized sea bay can be hidden, on a ship.

Makes you think.