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Caution and Warning System
The primary caution and warning system is designed to warn the crew of conditions that may adversely affect orbiter operations.

Orbiter Lighting System
The orbiter lighting system provides both interior and exterior lighting.

Smoke Detection and Fire Suppression
Smoke detection and fire suppression capabilities are provided in the crew cabin avionics bays, the crew cabin and the Spacelab pressurized module.

Payload Deployment and Retrieval System
The payload deployment and retrieval system includes the electromechanical arm that maneuvers a payload from the payload bay of the space shuttle orbiter to its deployment position and then releases it.

Payload Retention Mechanisms
Non-deployable payloads are retained by passive retention devices, and deployable payloads are secured by motor-driven, active retention devices.

Curator: Kim Dismukes | Responsible NASA Official: John Ira Petty | Updated: 04/07/2002
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