IS 5376 : 1969 Specification for Dioptric Lenses for Navigational Lanterns

1 Scope

1.1 This standard specifies the requirements for dioptric lensesfor use on all masthead, side and stern lanterns of sea-goingvessels.

2 References

IS 2 :1960 Rules for rounding offnumerical values

IS 988 : 1959General requirements for optical components

IS 1399 : 1959Glossary of terms used in optical technology

IS 1400 : 1960Specification for optical glass