NAVAIR INSTRUCTION 4120.11 From: Commander, Naval Air ...

NAVAIRINST 4120.11
“Remove safety disc (fig. 1, item 3) and safety disc
washer (figure 1, item 4) from valve body (fig. 1, item
2).”
A.4.7.13 Items on diagrams. Reference should be made to parts on
diagrams by enough of their description or reference designator
to identify the item (for example, resistor A6R11).
A.4.8 Multimedia presentation. Audio, video, and animation
techniques should only be used in an IETM when it results in
enhancing the presentation of the information or makes the
procedures more effective. Every instance used should be
discussed with and approved by the acquiring activity before any
audio, video, or animation presentation is included in an IETM.
Multimedia standards to be used for presentation techniques
should be specified by the acquiring activity.
A.4.9 Portraying signal flow. Signal flow, especially for
electrical and electronic equipment, critically affects the
understandability of diagrams. To assist the IETM user in
following the diagram, where possible, major signal or pressure
flow should be from left to right, and feedback or return flow
should be from right to left. Animation or color may be used to
indicate signal flow.
A.4.10 Color in illustrations. Color may be used when it will
enhance the understanding of the data. The use of some colors
may not be appropriate for certain environmental conditions.
The following color limitations should apply. Red should not be
used if the IETM will be used in red light conditions such as in
a tank or shelter. For IETMs that may be displayed on a
monochrome system, reverse video and/or underlining should be
used for hot spots rather than color. The use and choice of
colors should be as specified by the acquiring activity.
A.4.11 Revisions for IETMs.
a. Each revision to an IETM should be identified by a revision
date.
b. When updates to an IETM are made, the entire IETM should be
revised and reissued.
c. When an IETM is revised and reissued, revision summary
information should be included.
A.4.12 Revision symbols. Revision symbols should be inserted to
identify technical updates in text, illustrations, and tables.
a. Updates to the text and tables should be indicated by a
vertical line (revision bar) opposite the updated, deleted,
or added text (except as noted below). If the composing
Enclosure (4) 42