How does that ship work?

The ships of the warhammer universe work in two ways, for small trips like to the local moon or such they use standard fuel and thrusters, solar sails or similar.

For long distance travel the only option is the insanely dangerous use of Warp engines which punch a hole in reality into the timless realm of the warp.

Heres how that gose for a normal human space ship.

"The Captain calls down to prep the ship for warp expedition. At that time 12000 slaves who have never seen the outside of the work galley begins shoveling the dead bodies of the previous workers into massive furnaces along with whatever hard fuel sources they have in storage, like a brutal Mr. Fusion. As a field of pure Psychic FUCK YOU is generated around the ship, the blinded mentally traumatized man inside a metal egg begins screaming unendingly as he charts a course throughout the Warp, which is basically a giant ocean of pure emotion in which Unnamed Ones lounge around and fuck with humanity by the luxury of simply existing. The ship then ploughs into the miasma of what you could call Hell if you lacked imagination. Pray to the Holy Throne the Astropath doesn’t accidentally get you lost, become possessed by a Daemon or just explode like a mushy human pinata from the mental stress of being around so much pure CANNOT BE. If the void shields even flicker on the 8000 years old vessel (which no one actually understands completely how to work) Daemons made of RAPE and LEMON JUICE will crawl into our reality and do things you literally cannot imagine to every soul aboard. I mean that. The very notion of understanding the completeness of the horror the human victims will be witness to would shatter your perception of reality and cause your herat to explode."

"Mission clock says they were only in the Warp for 5 days. It was 17 months for everyone onboard. They also missed their destination by a couple of solar systems and 8/10th of the crew is dead."

"The Captain turns to his bride staff and pops the cork on a vintage stock of Jherrik Ale and salutes another successful Warp Jump."

Fortunately, as a deamon prince your already soaked in so much Warp stuff that the craziness of the warp doesn't really do anything to you except make you stronger, the same gose for your crew, the blessings of Nurgle make them technically partially deamon, so there's far less brain sploding.

Your ship started life as a normal human warship, but after timeless eternities soaking in the raw conflicting emotional hell scape of the warp it has become a deamon in its own right.

Its halls are fused with rotten flesh that scabs and grows, healing and reloading all by its self, this also allows you to ail the warp with no navigator's, as the ship itself knows where to go.

Sitting in the warp as it currently is the ship can simply Will itself back together, storing enough power to exist within the "Real" world for long periods of time unaffected.

Fortunately, as a deamon prince your already soaked in so much Warp stuff that the craziness of the warp doesn't really do anything to you except make you stronger, the same gose for your crew, the blessings of Nurgle make them technically partially deamon, so there's far less brain sploding.

Your ship started life as a normal human warship, but after timeless eternities soaking in the raw conflicting emotional hell scape of the warp it has become a deamon in its own right.

Its halls are fused with rotten flesh that scabs and grows, healing and reloading all by its self, this also allows you to ail the warp with no navigator's, as the ship itself knows where to go.

Sitting in the warp as it currently is the ship can simply Will itself back together, storing enough power to exist within the "Real" world for long periods of time unaffected.

The reason the warp is so bad is that it is the physical manifestation of peoples emotions.
All people.
All races.
Everywhere.

The sheer conflicting madness of even a hundred human expectations would birth something to horrible to describe, so pause for a moment and consider what several hundred trillion humans, orks, elves, beastmen, perverts and mad men would create.

yeah..