What is an essential safety measure when conducting deicing operations?

Regular fluid tests are crucial in deicing operations because they ensure that the deicing fluid is effective and meets safety standards. By conducting these tests, personnel can confirm that the fluid will perform as intended when applied to aircraft surfaces, which is necessary to prevent accidents related to ice build-up. The performance of the deicing fluid can deteriorate over time, so regular testing helps maintain the safety and operational integrity of the deicing process.

While the other options may contribute to overall operational safety and efficiency, they do not directly address the necessity of ensuring the deicing fluid is suitable for immediate use as effectively as regular fluid tests do.