What is Standard Note 2?

• A. Loss of Power
• B. Loss of System
• C. Loss of Water
• D. Loss of Air

Answer: (B)

In CSOSS, Standard Notes classify casualty conditions so sailors know quickly what kind of outage they’re dealing with and which procedures to follow. A designation for loss of system means the whole system has ceased to operate as a unit, not just a single component failing. It signals the crew to implement system-wide procedures, look for ways to isolate or reconfigure the affected system, and coordinate to restore or bypass the loss so essential capabilities can be maintained.

This is broader than faults like loss of power, water, or air, which point to specific support services rather than the entire system’s operation. Those would fall under different notes focused on the particular resource, whereas a loss of system indicates a complete breakdown of the system’s ability to function.

So, the best match is loss of system, because it captures a full-system failure that requires standardized, overarching response steps rather than addressing a single subsystem or resource.