In CSOSS, what is the function of a "control interlock"?

• A. A safety feature that prevents certain actions until prerequisites are satisfied, preventing unsafe operations.
• B. A device that allows unlimited actions.
• C. A method to override alarms remotely.
• D. A display of current engagement status.

Answer: (A)

In CSOSS, a control interlock is a safety gating device that blocks certain controls from being used until required conditions are met. It enforces proper sequencing and prevents entering unsafe states by tying actions to prerequisites such as correct mode, power availability, safety status, and other system conditions. This helps reduce operator error and ensures operations only proceed when it’s safe. It’s not about unlimited actions, it doesn’t remotely override alarms, and it isn’t just a status display—the interlock actively prevents a command from executing until the safe conditions are satisfied.