Concept for a personal project called 'aRevolution'.
The main harbor of Atoll 7 is located between the Main Station and Silver Fin, which are connected by LinkWay. Atoll 7 trades mostly with Atoll 9 and Reservoir B2. Most ships use new, alien technology that allows them to glide above water surface and take on much heavier cargo than regular ships. Some of these still remain active, though usually heavily modified. As the air outside the habitable areas is still considered unsafe, all ships and docking areas have protective and filtration systems. Since these areas are more difficult to be patrolled, harbor is also considered to be the 'grey area' and the possible location of the resistance.
Silver Fin is the main business, navigation and city control center. Its tip, where the council resides, is well over a kilometer above the ground. Half of the council consists of aliens who oversee the conditions and rights of their own kind within Atoll 7.