The Main Sector (メインセクター Mein Sekutā ) is the general area of the the BOTTLE SHIP. It connects to all the other sectors of the ship: Biosphere, Pyrosphere and the Cryosphere via the Main Elevator. The Main Sector also contains the Control Bridge, Bottle Ship Residential Area, Bottle Ship Control Room and Spaceport where Samus's Star Ship is docked and can be used as a save-and-recharge station when required.
A body of a Lab Worker is found here, leading to the boss battle with the Brug Mass in the Control Room.
Enemies[]

Samus engaging Geemers on a bridge in the Main Sector.
- Asborean
- Brug
- Brug Mass
- Bull
- Cyborg Zebesian
- Emperor Brug
- Fly Pod
- Geemer
- Ghalmanian
- Kyratian
- Mighty Griptian
- Phantoon
- Rage Hand
- Reo
- Rhedogian
- Sidehopper
- Skree
- Super Kihunter
- Super Zebesian
Metroid.com[]
Main Sector "Dark and desolate, this primary section of the BOTTLE SHIP is too quiet for comfort. It acts as a gateway to the more chaotic sections of the ship."
Gallery[]
Samus takes aim at the others in the Cargo Hold.
Samus meets Anthony and the other members of the 07th Platoon.
Samus with Lyle.
The long hall before the BOTTLE SHIP Control Room.
A long passageway leading to the Cargo Hold.
A Navigation Booth with auxiliary power.
Samus and the platoon engage the Brug Mass.
The Brug Mass with its arm frozen.
Samus and the other members of the platoon receive Adam's orders in the Bottle Ship Control Room.
Samus battles a Fly Pod in order to reactivate the Ship's main power in the System Management room.
Phantoon emerges from space outside the Control Bridge of the BOTTLE SHIP.
Samus finally arrives in the Bottle Ship Control Room, and sights Adam's helmet.
Samus returns to her Zero Suit as she approaches the helmet.
Samus holds the helmet to her chest and remembers all the times she shared with Adam.
Samus' emotional moment is interupted as the Bottle Ship P.A. Announcer declares that the Ship's self-destruct has been activated!
Samus heads towards the exit as the Countdown begins.
Samus races to her Star Ship as the BOTTLE SHIP begins to destabilize in the final stages of the detonation sequence.