工程师对数据的研究通常要经过三年的周期，并对校准间隔时间做出修改建议。
Engineers study the data, usually over a three-year period, and recommend changes to calibration intervals.
如果某台仪器总是在容许范围内，则工程师可能延长其校准间隔时间，这样能减少美国海军的成本。
If a particular instrument is consistently within tolerance, engineers may lengthen a calibration interval, which reduces the Navy's cost of ownership.
他们可能会建议减小校准间隔时间，或可能寻找这种状况的原因，并可能通过修改测试规程对其纠正。
They may recommend reducing calibration time or they may look for the cause of the condition and correct it, possibly by modifying the test procedure.
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