ASTM F906-85(2020)
(Specification)Standard Specification for Letters and Numerals for Ships
Standard Specification for Letters and Numerals for Ships
ABSTRACT
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.
SCOPE
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.
General Information
Relations
Standards Content (Sample)
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.
Designation:F906 −85 (Reapproved 2020) An American National Standard
Standard Specification for
Letters and Numerals for Ships
ThisstandardisissuedunderthefixeddesignationF906;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 3.1.2 Character Width:
3.1.2.1 Type 1, Plain Characters—12 in accordance with
1.1 This specification specifies shape, size, spacing, and
Fig. 1 unless otherwise noted.
shading of letters and numerals to be used aboard ship.
3.1.2.2 Type 2, Block Characters—8 units in accordance
1.2 Characters are of Five Types:
with Fig. 2 unless otherwise noted.
1.2.1 Type 1—Plain letters and numerals (16 units).
3.1.2.3 Type 3, Block Characters with Shading—Same as
1.2.2 Type 2—Block letters and numerals (12 units).
Type 2 plus 1 unit for shading in accordance with Fig. 3.
1.2.3 Type 3—Type 2 characters with shading (shading—1
3.1.2.4 Type 4, Block Characters, Letters—Width varies.
unit).
Numerals—8 units.
1.2.4 Type 4—Block letters (10 units) and numerals (12
3.1.2.5 Type 5, Block Characters with Shading—Same as
units).
Type 4 plus 1 unit for shading.
1.2.5 Type 5—Type 4 characters with shading (shading—1
3.2 Sizing of the Character:
unit).
3.2.1 Type 1—Space characters in accordance with Table 1.
1.3 This specification does not give location or size of
3.2.2 Type 2—Space characters in accordance with Table 1.
various shipboard markings incorporating letters and numerals.
3.2.3 Type 3—Space characters in accordance with Table 1
1.4 This international standard was developed in accor- with 1 unit added to each value for shading.
dance with internationally recognized principles on standard-
3.2.4 Type 4—Space letters in accordance with Fig. 4;
ization established in the Decision on Principles for the spacing shall be equal to the space following the letter.
Development of International Standards, Guides and Recom-
Numerals shall be spaced in accordance with Table 1.
mendations issued by the World Trade Organization Technical
3.2.5 Type 5—Space letters in accordance with Fig. 5;
Barriers to Trade (TBT) Committee. spacing shall be equal to the space following the letter.
Numerals shall be spaced in accordance with Table 1 with 1
2. Ordering Information
unit added to each value for shading.
2.1 When ordering letters and numerals in accordance with
3.3 Spacing Between Words, After Punctuation, or Between
this specification, it is necessary to state theASTM designation
Sentences:
and the type and height of the character.
3.3.1 The space between words, after a comma, and after a
period (as after initials) shall be in accordance with Table 1.
3. General Requirements
3.3.2 The space between sentences shall be in accordance
3.1 Characters are designed using the grid method which
with Table 1.
allows the size of the character to be changed proportionately
3.3.3 The space between a letter and a comma or period (for
as required.
any use) shall be 2 units.
3.1.1 Character Stroke (thickness—2 units).
3.3.4 The space between lines shall be equal to one half the
height of the tallest letter.
This specification is under the jurisdiction of ASTM Committee F25 on Ships
4. Keywords
and Marine Technology and is the direct responsibility of Subcommittee F25.07 on
General Requirements.
4.1 block characters; block letters; block numerals; letters;
Current edition approved Feb. 1, 2020. Published February 2020. Originally
marine; numerals; plain letters; plain numerals; shading; ship;
approved in 1984. Last previous edition approv
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