Oxygen Mask Checkpoint

Oxygen Mask Checkpoint is a placement entity that requires a paired docking station to be built adjacent to it in a specific orientation. The critical rule for this building is that a corresponding dock must be constructed on the side opposite the direction the checkpoint's arrow indicates. This orientation relationship is enforced by the game: the checkpoint and its dock form a linked pair and must be positioned facing one another across the checkpoint, with the dock located on the reverse side of the arrow.

Across localizations the paired structure is described consistently: the checkpoint must have a correlated dock/station built on the side opposite the arrow. Localization text refers to the paired piece variously as a dock, station, or storage for suits, but the functional requirement is the same in every language — the dock must sit on the side of the checkpoint opposite the arrow’s pointing direction.

Practical notes for placement and layout:

• Always check the arrow orientation on the checkpoint before placing the dock. The dock must be placed on the opposite side from where the arrow points.
• The term “correlated” implies the dock is matched to that checkpoint; do not assume any station placed elsewhere will satisfy the requirement.
• When planning a corridor or airlock with multiple checkpoints, ensure each checkpoint’s arrow orientation allows room on the opposite side for its dock; misoriented or obstructed placements can prevent valid construction.
• Because the requirement appears in every supported language, treat the opposite-side dock rule as mandatory for building valid checkpoint setups.

No other functional behavior, restrictions, or mechanics are specified by the available source texts beyond this placement requirement.