In a boat yard, you will see all kinds of creations. This is not a spaceship, it is a hydrofoil glass bottom boat.
The bow has a glass bottom which comes out of the water when the boat picks up speed and rises up on the foils at the bow.
The stern is like a normal boat, driven by a massive outboard motor.
The black orb on the bow of the boat is not tinted glass or anything, it is merely black paint (I was a little disappointed when I found that out). This does make it very useful for getting places quickly while protecting the glass bottom, simply take it out of the water! Zip on over there, then slow down and submerge the viewing scope to the bottom of the sea.