Each inert gas system must be equipped with the following instruments: oxygen concentration indicator and recorder, pressure indicator and recorder, and temperature indicator. The point of measurement for these instruments must be located __________.

Correct Answer: Option C — downstream of the blowers

46 CFR 32.53-40 mandates that instrumentation for oxygen, pressure, and temperature must be located downstream of the blowers. This placement ensures that the monitoring equipment measures the actual condition of the inert gas being delivered to the cargo tanks, providing accurate data for the system's safety and performance control.