He squeezed into/through the 'hatch' and crawled below deck.
They 'hatched' a plot to overthrow the government.
a whiskey that goes 'down the hatch' smoothly
(..) - Captain, I think we can redirect it. There's a seal construction, perhaps that will let you vent the weapon into space. Now we can override the locks, from out here, but you have to activate the hatch. - Isn't there any button? - It's not a button. It's a simple lever under the *something*. - Got it. - And there's of them. Once you have activated lock, there should quitting immediately. If the hatch is opened when the CPU starts next cycle you are gonna get sucked into space. What happens when the hatch isn't opened? You are gonna get sucked into big fan. (..)2016 Star Trek Beyond