ASTM F906-85(2003)

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An American National Standard
Designation: F 906 – 85 (Reapproved 2003)
Standard Specification for
Letters and Numerals for Ships
This standard is issued under the fixed designation F 906; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.1.2.2 Type 2, Block Characters—8 units in accordance
with Fig. 2 unless otherwise noted.
1.1 This specification specifies shape, size, spacing, and
3.1.2.3 Type 3, Block Characters with Shading—same as
shading of letters and numerals to be used aboard ship.
Type 2 plus 1 unit for shading in accordance with Fig. 3.
1.2 Characters are of Five Types:
3.1.2.4 Type 4, Block Characters, Letters—width varies.
1.2.1 Type 1—Plain letters and numerals (16 units).
Numerals—8 units.
1.2.2 Type 2—Block letters and numerals (12 units).
3.1.2.5 Type 5, Block Characters with Shading—same as
1.2.3 Type 3—Type 2 characters with shading (shading—1
Type 4 plus 1 unit for shading.
unit).
3.2 Sizing of the Character:
1.2.4 Type 4—Block letters (10 units) and numerals (12
3.2.1 Type 1—space characters in accordance with Table 1.
units).
3.2.2 Type 2—space characters in accordance with Table 1.
1.2.5 Type 5—Type 4 characters with shading (shading—1
3.2.3 Type 3—space characters in accordance with Table 1
unit).
with 1 unit added to each value for shading.
1.3 This specification does not give location or size of
3.2.4 Type 4—space letters in accordance with Fig. 4;
variousshipboardmarkingsincorporatinglettersandnumerals.
spacing shall be equal to the space following the letter.
2. Ordering Information Numerals shall be spaced in accordance with Table 1.
3.2.5 Type 5—space letters in accordance with Fig. 5;
2.1 When ordering letters and numerals in accordance with
spacing shall be equal to the space following the letter.
this specification, it is necessary to state theASTM designation
Numerals shall be spaced in accordance with Table 1 with 1
and the type and height of the character.
unit added to each value for shading.
3. General Requirements
3.3 Spacing Between Words, After Punctuation, or Between
Sentences:
3.1 Characters are designed using the grid method which
3.3.1 The space between words, after a comma, and after a
allows the size of the character to be changed proportionately
period (as after initials) shall be in accordance with Table 1.
as required.
3.3.2 The space between sentences shall be in accordance
3.1.1 Character Stroke (thickness—2 units).
with Table 1.
3.1.2 Character Width:
3.3.3 The space between a letter and a comma or period (for
3.1.2.1 Type 1, Plain Characters—12 in accordance with
any use) shall be 2 units.
Fig. 1 unless otherwise noted.
3.3.4 The space between lines shall be equal to one half the
height of the tallest letter.
4. Keywords
This specification is under the jurisdiction of ASTM Committee F25 on Ships
and Marine Technology and is the direct responsibility of Subcommittee F25.07 on
4.1 block characters; block letters; block numerals; letters;
General Requirements.
marine; numerals; plain letters; plain numerals; shading; ship;
Current edition approved Dec. 1, 2003. Published January 2004. Originally
approved in 1984. Last previous edition approved in 1998 as F 906 – 85 (1998). ship letters; ship markings; ship numerals
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