CENTER LINES Lines that indicate the center of a
ALIGNED SECTION A section view in which some
circle, arc, or any symmetrical object; consist of
internal features are revolved into or out of the plane
alternate long and short dashes evenly spaced.
of the view.
COMPUTER LOGIC The electrical processes used
APPLICATION BLOCK A part of a drawing of a
by a computer to perform calculations and other
subassembly showing the reference number for the
drawing of the assembly or adjacent subassembly.
DIGITAL The processing of data by numerical or
ARCHITECT'S SCALE Scale used when dimen-
sions or measurements are to be expressed in feet
DRAWING NUMBER An identifying number
assigned to a drawing or a series of drawings.
AUXILIARY VIEW An additional plane of an object,
DRAWING The original graphic design from which a
drawn as if viewed from a different location. It is
blueprint may be made; also called plans.
used to show features not visible in the normal
ELECTROMECHANICAL DRAWING A special
type of drawing combining electrical symbols and
AXONOMETRIC PROJECTION A set of three or
mechanical drawing to show the composition of
more views in which the object appears to be
equipment that combines electrical and mechanical
rotated at an angle, so that more than one side is
E L E M E N T A R Y WIRING DIAGRAM (1) A
BILL OF MATERIAL A list of standard parts or raw
shipborad wiring diagram showing how each
materials needed to fabricate an item.
individual conductor is connected within the
various connection boxes of an electrical circuit or
BLOCK DIAGRAM A diagram in which the major
system. (2) A schematic diagram; the term is
components of a piece of equipment or a system are
sometimes used interchangeably with schematic
represented by squares, rectangles, or other
diagram, especially a simplified schematic diagram.
geometric figures, and the normal order of
EMERGENCY Event or series of events in progress
progression of a signal or current flow is represented
that will cause damage to equipment unless
immediate, timely, and correct procedural steps are
BLUEPRINTS Copies of mechanical or other types of
technical drawings. Although blueprints used to be
FAIL POSITION Operating or physical position to
blue, modem reproduction techniques now permit
which a device will go upon loss of its control signal,
printing of black on white as well as colors.
FAIL Loss of control signal or power to a component.
BODY PLAN An end view of a ship's hull, composed
Also breakage or breakdown of a component or
of superimposed frame lines.
BREAK LINES Lines to reduce graphic size of an
FINISH MARKS Marks used to indicate the degree of
object, generally to conserve paper space.
smoothness of the finish to be achieved on surfaces
to be machined.
CASUALTY An event or series of events in progress
FORMAT The general makeup or style of a drawing.
during which equipment damage and/or personnel
injury has occurred. The nature and speed of these
FUNCTION To perform the normal or characteristic
events are such that proper and correct procedural
action of something, or a special duty or
steps will only serve to limit equipment damage
performance required of a person or thing in the
course of work.
and/or personnel injury.