How can one determine the liquid level in an MC-331 cargo tank?

The determination of the liquid level in an MC-331 cargo tank can be effectively accomplished by using a rotary gauge. A rotary gauge provides a mechanical means to measure the height of the liquid inside the tank, often translating that level into a readable figure on a dial. The design of rotary gauges is specific to the construction of MC-331 tanks and provides an accurate reflection of the liquid level, which is crucial for tank monitoring and safe operations.

Visual inspection, while it may offer some insight, is not a reliable method for accurately determining liquid levels in a cargo tank due to the potential for obstructions or the inability to see the liquid surface clearly. Pressure gauges, although useful for assessing other conditions within the tank, do not directly indicate liquid levels and would require conversion calculations to deduce any informative data about liquid height. Flow rate calculations are also not suitable for determining a static liquid level, as they relate to the movement of liquids rather than their static measurements in a tank.

Thus, the use of a rotary gauge stands out as the most effective and accurate method for determining liquid levels in an MC-331 cargo tank.