Which of the illustrated devices would be the LEAST accurate for the purposes of weighing-in a refrigerant charge? Illustration GS-RA-45
Official USCG Answer & Rule Citation
Correct Answer: Option C — C
Mechanical spring scales or hanging scales are subject to calibration drift, shipboard vibration inaccuracies, and parallax error, making them the least precise method for precise refrigerant charging compared to electronic digital scales mandated for accurate mass verification.
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