What should be ensured when conducting an End-to-End test on the M1A1 Gunner's quadrant?

When conducting an End-to-End test on the M1A1 Gunner's quadrant, it is crucial to ensure that both scales are zeroed. Zeroing the scales is essential for accurate readings and performance measurement. If the scales are not zeroed, any data collected during the test will be skewed, leading to potentially inaccurate results and affecting the overall assessment of the system's functionality.

In this context, zeroing both scales ensures that the measurements reflect the true positional changes and allows for precise calibration of the quadrant's performance. Accurate zeroing is foundational for any subsequent operations, adjustments, or calibrations that may need to occur based on the test results, ensuring effective and reliable operation of the weapon system.

While aspects like tool calibration and adherence to safety protocols are important, in the specific context of testing the quadrant's accuracy and functionality, the act of zeroing the scales directly impacts the success and validity of the test.