"Dr. Siderial, we still have a mission to carry out, so we can't accompany you any further. When you need to return, you can come directly to the Marine base at the Sabaody Archipelago. We'll be responsible for sending you back."
The Marines had brought him here, so naturally they would be responsible for taking him back. However, Oran needed to make a stop at Merfolk Island along the way, which made things a little unusual.
Merfolk Island lay ten thousand meters beneath the sea. Among all currently known nations, it had the lowest average elevation and the most unusual surrounding environment.
The Red Line Continent split the Grand Line in two. When the Marines wanted to head to the New World, they generally changed ships but not personnel, simply crossing the Red Line Continent at Mary Geoise. As a result, the Marines rarely went to Merfolk Island.
But pirates could not do that. They could not pass through Mary Geoise, and aside from the very few who could fly, their only option was to travel through Merfolk Island and reach the New World from beneath the sea.
This brought endless trouble to Merfolk Island.
Due to the extremely chaotic magnetic fields of the Grand Line, sailing here required reliance on a Log Pose.
It was a special spherical compass that recorded the magnetic attraction between islands, using it to point the way toward the next island.
Thus, whenever one arrived at an island, they had to wait anywhere from several hours to several months for the Log Pose to finish recording before they could depart for the next island.
The Sabaody Archipelago itself consisted of countless mangrove tree islands and had no such magnetic field. Therefore, once one reached its vicinity, every Log Pose pointed toward Merfolk Island.
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