Submarine

I just wanted to tell you that we are having a party out here on the floating dock. - Milla Vodello.

Oh darling, you can always check these articles whether you’re having trouble finding missing stuff.
but not just Collectibles, you can learn a thing or two about the various areas of the Physical World.

Warning! This article or section contains spoilers for Psychonauts and/or its sequels. Read with caution!

Submarine

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“Okay, now I just have to remember all that submarine instrument training I took. Oh wait, that was just a comic book I read. But still.”

–Raz

The submarine is an area in Psychonauts in the Rhombus of Ruin. It is connected to the end of the Boxcar Train. It has a shark decal painted on top.

Psychonauts in the Rhombus of Ruin[]

There is a periscope and two fish guards inside. The periscope is used to locate Sasha Nein. Once located, Raz can use clairvoyance to jump from the submarine into Sasha's point of view - inside the Fake UFO.