IS 9898 : 1981 Specification for Heliotrope, Surveying

1 Scope

1.1 This standard covers the requirements for surveyingheliotrope of sizes 150 mm, 230 mm and 300 mm used as sun signal ingeodetic and hydrographic survey.

2 References

IS 292 : 1961Specification for brass ingots and castings

IS 319 : 1974Specification for free-cutting brass bars, rods andsections

IS 320 : 1962Specification for high tensile brass rods and sections

IS 410 : 1977Specification for cold rolled brass sheet, strip and foil

IS 617 : 1975Specification for aluminium and aluminium alloy ingotsand castings for general engineering purposes

IS 4413 : 1967Specifications for brass wires for general engineeringpurposes

IS 4827 : 1968 Specification for electroplatedcoatings of nickel andchromium on copper and copper alloys

IS 7011 : 1973Specification for back-silvered mirrors used ininstrument industry