Final answer:
NAVSEA 4734/15 and NAVSEA 4734/16 are used by the US Navy to note unusual or special conditions in calibration, such as deviations from usual calibration tolerances or the need for in-place calibration.
Step-by-step explanation:
When there are unusual or special conditions that need to be noted in calibration, such as deviations from usual calibration tolerances, multiple calibration intervals, a special requirement for in-place calibration, or the need to refer to a correction factor chart, the US Navy uses two specific documents: NAVSEA 4734/15 and NAVSEA 4734/16.
NAVSEA 4734/15 is used when there are deviations from usual calibration tolerances or multiple calibration intervals. It ensures that these deviations are properly recorded and noted.
NAVSEA 4734/16 is used when there is a special requirement for in-place calibration or the need to refer to a correction factor chart. It provides guidelines for documenting and implementing these special requirements.