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This specification covers the shape, size, spacing, and shading requirements of letters and numerals used in shipboard markings. Covered by this specification are five types of characters: plain letters and numerals (Type 1), block letters and numerals having the same width (Type 2), Type 2 characters with shading (Type 3), block letters and numerals of different widths (Type 4), and Type 4 characters with shading (Type 5). The characters shall be designed using the grid method, which will allow one to change the character size proportionately as required. Not covered in this specification are the location and size of various shipboard markings using letters and numerals.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification specifies shape, size, spacing, and shading of letters and numerals to be used aboard ship.
1.2 Characters are of Five Types:
1.2.1 Type 1—Plain letters and numerals (16 units).
1.2.2 Type 2—Block letters and numerals (12 units).
1.2.3 Type 3—Type 2 characters with shading (shading—1 unit).
1.2.4 Type 4—Block letters (10 units) and numerals (12 units).
1.2.5 Type 5—Type 4 characters with shading (shading—1 unit).
1.3 This specification does not give location or size of various shipboard markings incorporating letters and numerals.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ICS Number Code 01.080.20 (Graphical symbols for use on specific equipment); 47.020.01 (General standards related to shipbuilding and marine structures)
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ASTM F906-85(2020), Standard Specification for Letters and Numerals for Ships, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top