This modified herja features two "upgrades":
-A dance pad navigation terminal.
-a railgun elevator.
How to use the dance pad:
There are two navigation terminals on this ship : a big hidden one and a small one.
Only one of the two is active at the same time.
Activate a terminal by pressing the button on the left side ("funky" or "sneaky").
Once the disco light are on, the speed of the sub is determined by your position in the room (not by the arrow on the terminal).
The small terminal is classic but with the speed limited.
How to use the elevator:
Stand on it and and wait. Bots will take the elevator.
The railgun is decoration. The elevator is in fact a gravity shpere with high attraction.