How often should calibration of critical measurement tools be performed on Navy ships, and what documentation is typically kept?

• A. At regular intervals per policy or manufacturer; maintain calibration records and traceability; update PMCS or tool logs
• B. Every decade; no records
• C. Whenever the tool feels off; no logs
• D. Monthly with no standard

Answer: (A)

Regular calibration of critical measurement tools is essential because instrument drift over time can compromise safety and mission readiness. The schedule is driven by policy or the manufacturer’s recommendations to ensure measurements stay within required tolerances and to catch drift before it affects operations.

Keeping calibration records with traceability means you can prove the tool is calibrated to a known standard, know when the next calibration is due, and track results and any adjustments made. Documentation such as PMCS entries or dedicated tool logs provides a centralized, auditable history of each instrument—who performed the calibration, what standard was used, the results, and any corrective actions. This supports maintenance planning, audits, and ensures that tools in use are within spec.

Why the other approaches aren’t suitable: calibrating only every decade is too infrequent for tools that directly affect safety and performance; relying on a tool “feeling” off is subjective and dangerous; and monthly calibrations without a standard or record-keeping lead to inconsistent practice and loss of traceability.

So, the best practice is to calibrate at regular intervals per policy or manufacturer, maintain calibration records with traceability, and update PMCS or tool logs.