Designation:F906−85(Reapproved2014)AnAmericanNationalStandardStandardSpecificationforLettersandNumeralsforShips1ThisstandardisissuedunderthefixeddesignationF906;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationspecifiesshape,size,spacing,andshadingoflettersandnumeralstobeusedaboardship.1.2CharactersareofFiveTypes:1.2.1Type1—Plainlettersandnumerals(16units).1.2.2Type2—Blocklettersandnumerals(12units).1.2.3Type3—Type2characterswithshading(shading—1unit).1.2.4Type4—Blockletters(10units)andnumerals(12units).1.2.5Type5—Type4characterswithshading(shading—1unit).1.3Thisspecificationdoesnotgivelocationorsizeofvariousshipboardmarkingsincorporatinglettersandnumerals.2.OrderingInformation2.1Whenorderinglettersandnumeralsinaccordancewiththisspecification,itisnecessarytostatetheASTMdesignationandthetypeandheightofthecharacter.3.GeneralRequirements3.1Charactersaredesignedusingthegridmethodwhichallowsthesizeofthecharactertobechangedproportionatelyasrequired.3.1.1CharacterStroke(thickness—2units).3.1.2CharacterWidth:3.1.2.1Type1,PlainCharacters—12inaccordancewithFig.1unlessotherwisenoted.3.1.2.2Type2,BlockCharacters—8unitsinaccordancewithFig.2unlessotherwisenoted.3.1.2.3Type3,BlockCharacterswithShading—sameasType2plus1unitforshadinginaccordancewithFig.3.3.1.2.4Type4,BlockCharacters,Letters—widthvaries.Numerals—8units.3.1.2.5Type5,BlockCharacterswithShading—sameasType4plus1unitforshading.3.2SizingoftheCharacter:3.2.1Type1—spacecharactersinaccordancewithTable1.3.2.2Type2—spacecharactersinaccordancewithTable1.3.2.3Type3—spacecharactersinaccordancewithTable1with1unitaddedtoeachvalueforshading.3.2.4Type4—spacelettersinaccordancewithFig.4;spacingshallbeequaltothesp...
