ASTM F906-85(2014)

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.

General Information

• Status: Historical
• Publication Date: 28-Feb-2014
• ICS: 01.080.20 - Graphical symbols for use on specific equipment
• ICS: 47.020.01 - General standards related to shipbuilding and marine structures
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.07 - General Requirements

Relations

• Replaces: ASTM F906-85(2007) - Standard Specification for Letters and Numerals for Ships
• Effective Date: 01-Mar-2014
• Replaced By: ASTM F906-85(2020) - Standard Specification for Letters and Numerals for Ships
• Effective Date: 01-Feb-2020
• Referred By: ASTM F2363/F2363M-17(2023) - Standard Specification for Sewage and Graywater Flow Through Treatment Systems
• Effective Date: 01-Mar-2014

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F906 −85 (Reapproved 2014) 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 3.1.2.2 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;
various shipboard markings incorporating letters and numerals.
spacing shall be equal to the space following the letter.
Numerals shall be spaced in accordance with Table 1.
2. Ordering Information
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.
3.3 Spacing Between Words, After Punctuation, or Between
3. General Requirements
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.
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 March 1, 2014. Published March 2014. Originally
marine; numerals; plain letters; plain numerals; shading; ship;
approved in 1984. Last previous edition approved in 2007 as F906 – 85 (2007).
DOI: 10.1520/F0906-85R14. ship letters; ship markings; ship numerals
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