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National Stock Number:
6645-01-285-4284
Federal Supply Class:
6645
National Item Identification Number:
012854284
Description:
CHRONOMETER
Detail:
AN INSTRUMENT FOR PRECISELY DETERMINING TIME, MANUFACTURED TO CLOSE TOLERANCES TO ASSURE THE TIME-KEEPING QUALITIES OF DEPENDABILITY AND CONSISTENCY OF RATE. THESE QUALITIES ARE ACCURATELY ASCERTAINED BY COMPARISON WITH MORE EXACT DEVICES OR BY ASTRONOMICAL METHODS SO THAT THE ACCUMULATED ERROR MAY BE TAKEN INTO ACCOUNT WHEN DETERMINING TIME. ITS USUAL USES ARE TO INDICATE TIME FOR NAVIGATIONAL PURPOSES, AND TO SERVE AS A REFERENCE FOR LESS ACCURATE TIMEPIECES. IT IS USUALLY PROVIDED WITH A WINDING INDICATOR DIAL AND IS USUALLY MOUNTED IN GIMBALS TO MAINTAIN THE INSTRUMENT IN A LEVEL POSITION. MAY CONSIST OF A SPRING DRIVEN OR OTHER TYPE OF MOVEMENT WHICH IS CAPABLE OF EXACTING PERFORMANCE WITHOUT REGULATION THROUGHOUT THE NORMAL RANGE OF ROOM TEMPERATURES. NOT DESIGNED FOR CARRYING ON THE PERSON.
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Manufacturer Information:
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Techincal Specification:
| DIAL OUTSIDE DIAMETER | 3.125 INCHES | | GRADUATION UNIT | 1.000 HOUR | | OVERALL DIAMETER | 3.175 INCHES NOMINAL | | OVERALL LENGTH | 3.885 INCHES NOMINAL | | OVERALL WIDTH | 2.750 INCHES NOMINAL | | SCALE NAME | 24 HOUR | | SCALE QUANTITY | 3 | | SCALE RANGE | +0.0 TO 24.0 HOUR |
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