GB/T 12931-1991
AbolishedMarine sextant
航海六分仪
Application Summary AI generated
GB/T 12931-1991 specifies the technical requirements, test methods, inspection rules, and marking for marine sextants used in celestial navigation. It applies to the design, manufacturing, and quality verification of sextants aboard ships and other maritime vessels for measuring the altitude of celestial bodies. The standard ensures accuracy and reliability in navigational instruments for ocean-going and coastal shipping operations.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.