The Pickup Point block will project a 3x3 detection sphere. When a ship's docking module enters that detection area, the entity will be guided to a Pickup Rail if applicable. Ships will remember the last used Pickup Area modules they dock to and if they're part of a fleet, they'll return to them when the "Carrier Recall" order is issued. The flagship is where they'll try to return, multiple carriers per fleet is not allowed yet.