You need to be in chapter 4 and you are able to access the elevator in order to reroute the power for the ADS cannons

Take the elevator in the main atrium to the 3th Floor.

You should arrive at this room

Follow along the hallway untill you reach the break room
Enter it ...

Go into the circle of the ritual



1. Melee
2. Stomp
3. Melee
4. Melee
5. Stomp
6. Melee
7. Stomp
8. Melee
9. Melee
10. Melee
11. Melee
12. Stomp

A audio log will appear.
Play it and you will hear the Ishimura Wellerman Song

There once was a ship from the CEC
The Ishimura USG
She'd crack a moon with gravity
Go me bullyboys, go-ha!

Soon may the Kellimon come
To save our souls and take us home
One day when the fixin' is done
We'll take our leave and go

Three score years she served her tour
Thirty planets cracked and more
The captrain called "no-fly" and swore
He'd take that Marker in tow-ha!

Soon may the Kellimon come
To save our souls and take us home
One day when the fixin' is done
We'll take our leave and go

La-da da-da-da-da
Da-da-da-da da-da-da-da
La-da da-da-da-da
La-da-da da-da-da

Before the ship could set on home
Tragedy's struck, and the colony's all gone
The old Red Marker done them wrong
And brought the miners low-ha!

Soon may the Kellimon come
To save our souls and take us home
One day when the fixin' is done
We'll take our leave and go

The ghouls abord, a mystery
Spoke of in Unitology
The capatin swore he'd keep his creed
And dragged his crew down so-ha!

Soon may the Kellimon come
To save our souls and take us home
One day when the fixin' is done
We'll take our leave and go