An airlock door in the east wall requires an Arkean key card to open. It takes one turn to cycle air to water or water to air and back. The inner chamber is filled with sea water. Six vehicles are docked in alcoves on the west wall. A tunnel leading north has a dim blue light ring around it.

• Vehicles — A flat slim board that can be held onto by a traveller. Using one increased swim speed by 30'. The vehicles, which resemble sting rays in design, are worth 5,000 gp each.
• Inner Chamber — Smooth azure tile with smooth round transitions between wall, floor, and ceiling.

(Diagram with nodes 5.19, 5.18; sketch of sting ray vehicle)