Which of the following is NOT a consideration for cargo tank discharge operations?

In cargo tank discharge operations, considerations are paramount to ensure safety and compliance with regulations. While timing the unloading process may seem relevant for operational efficiency, it does not specifically pertain to safety protocols or regulatory compliance in the same way the other options do.

Proper labeling of hoses is critical because it helps in identifying the substance being discharged and avoiding cross-contamination or handling errors. Securing all valves is essential to prevent leaks or spills during the operation, which could pose significant safety hazards. Completion of the cargo manifest is crucial as it serves as a legal document that tracks what is being transported and provides necessary information to emergency responders in case of an incident.

In contrast, timing the unloading process does not directly align with safety measures or operational protocols required by NFPA 58 and is not considered a primary operational consideration in this context.