certain manner, but also uses different types of lines to
Much of the information contained in the various
convey information. Line characteristics, such as
manuals issued by the Naval Air Systems Command for
width, breaks in the line, and zigzags, have meanings,
Navy aircraft and equipment is in the form of
as shown in figure 1-3.
schematic, block, and pictorial drawings or diagrams.
To understand how a system or component of the
INTERPRETATION OF DRAWINGS
aircraft functions, you must be able to read and
understand these drawings and diagrams.
Schematic drawings are usually used to illustrate
the various electrical circuits, hydraulic systems, fuel
MEANING OF LINES
systems, and other systems of the aircraft. The
components of an electrical circuit are normally
The alphabet of lines is the common language of
represented by the standard electrical symbols shown
the technician and the engineer. In drawing an object, a
draftsman not only arranges the different views in a
Figure 1-3.--Line characteristics--Continued.