Gates of Justice

The Gates of Justice (正義の門, Seigi no Mon) are three massive structures that each located in the Marine Headquarters, Impel Down, and Enies Lobby. They resemble large gates built into the air.

Usage
The purpose of these gates is to allow easy travel for Marines between the three respective places they are located in. Beyond the gates is a massive spiral water current that is in between the three locations. By riding this current, the Marines are able to travel much faster to these locations than they would normally. Traveling normally through on this current while the gates are closed however would simply force any ship to pass on by the locations due to current. When the gates are open, the current is let in and any ship can enter their destinations with ease.

Enies Lobby Gate
The Gate here in Enies Lobby is considered the final location. Once you pass beyond the gate, the only two places you can go are Marine HQ or Impel Down. Once a criminal passes through the gates, there is no longer any hope left for them.

Because of the gate located here, massive whirlp

In order for ships to pass into Enies Lobby, the gates must open. Opening the gates causes the waterfalls around Enies Lobby to fill up, allowing safe passage to and from the island.