MIL-DTL-24784/20B (SH)
TABLE I. Text size and style. (note 1)
USE
SIZE AND STYLE
Art callouts (pictorials, and so forth)
8 point
Art lettering
7 point
Circled keying numbers on FBD art
8 point
Circled keying numbers on pictorials
10 point
Art drawing sheet numbers, title blocks, main
8 point
drawing number blocks, hardware boundary
titles, and functional boundary titles
Running heads
10 point bold
Dangers (heading)
14 point bold
Warnings (heading)
14 point bold caps, boxed
Cautions (heading)
14 point bold caps, underlined
Notes (heading)
10 point caps
Rules
1 point
1 Text for notes, dangers, cautions, and warnings shall be short-measured; that is indented from
left and right margins of overall text area.
3.4 Arrangement. Unless otherwise specified in the technical manual contract requirements
(TMCR) (see 6.2), the manual shall be arranged in a standardized format [that is, front matter,
technical content, appendices, glossaries, indices and Technical Manual Deficiency/Evaluation
Report (TMDER)] and appropriately divided by volume, part, chapter and section in accordance
with MIL-DTL-24784.
3.5 Format and preparation instructions. Unless otherwise specified in the TMCR, the writing
style, safety precautions, tabular material, and numbering shall be in accordance with
MIL-DTL-24784 and as follows (see 6.2).
3.5.1 Graphics. Unless otherwise specified in the TMCR (see 6.2), the preparation of
illustrations, drawings, diagrams and sketches shall be in accordance with MIL-DTL-24784 and
the following paragraphs.
3.5.1.1 Functional block diagrams (FBDs). A system of FBDs shall be used to depict the
functional divisions of the system. (A functional division is defined as a function or a portion of a
function that performs a particular task in relationship to the entire system.) The diagrams shall
depict the system in an integrated manner; that is, a master FBD shall show each function of the
system; primary FBDs shall show the functional divisions of the system; and third-level or lower-
level FBDs shall show further functional subdivisions of complex subfunctions. The lowest level
of FBD shall be directly linked to functional circuit diagrams (FCDs) (contained in Chapter 5) or
to the hardware where the function is performed. This reference shall be by the hardware
reference designator. The FBD/FCD structure and relationship is shown on
figure 20-1.
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