Appendix I Glossary - Cont'd -141220092

PERIPHERAL Existing on or near the boundary of a

INTERCONNECTION DIAGRAM Diagrams that

surface or area.

show the cabling between electronic units, as well

as how the terminals are connected.

PICTORIAL DRAWING A drawing that gives the

real appearance of an object, showing the general

ISOMETRIC DRAWING A type of pictorial

location, function, and appearance of parts and

drawing. See isometric wiring diagram.

assemblies.

ISOMETRIC WIRING DIAGRAM A diagram

PLAN VIEW A view of an object or area as it would

showing the outline of a ship, an aircraft, or other

appear from directly above.

structure, and the location of equipment, such as

panels and connection boxes and cable runs.

REFERENCE NUMBERS Numbers used on one

drawing to refer the reader to another drawing for

LEADER LINES Thin, unbroken lines used to

more detail or other information.

connect numbers, references, or notes to

appropriate surfaces or lines.

REVISION BLOCK Located in the upper right corner

LEGEND A description of any special or unusual

of a print. Provides a space to record any changes

made to the original print.

marks, symbols, or line connections used in the

drawing.

SCALE The ratio between the measurement used on a

drawing and the measurement of the object it

LOGIC DIAGRAM A type of schematic diagram

represents. A measuring device, such as a ruler,

using special symbols to show components that

perform a logic or information processing function.

having special gradations.

SCALING Applying a factor of proportionality to data

MECHANICAL DRAWING See drawings. Applies

to scale drawings or mechanical objects.

or signal levels.

MIL-STD Military standards. A formalized set of

SCHEMATIC DIAGRAM A diagram using graphic

standards for supplies, equipment, and design work

symbols to show how a circuit functions electrically.

purchased by the United States Armed Forces.

SHIP'S PLANS A set of drawings of all significant

MODULE Subassemblies mounted in a section.

construction features and equipment of a ship, as

needed to operate and maintain the ship. Also called

MONITOR One of the principal operating modes of a

onboard plans.

data logger that provides a constant check of plant

conditions.

SPAN Distance between two points.

NORMAL MODE Operating condition at normal

SPECIFICATION Detailed

description or

ahead speeds, differing from maneuvering, where

identification relating to quality, strength, or similar

certain functions, pumps, or valves are not required,

performance requirement.

while others are for proper operation of ship and

STATUS LOG Record of the instantaneous values of

machinery.

important conditions having analog values.

NOTES Descriptive writing on a drawing to give

SYMBOL Stylized graphical representation of

verbal instructions or additional information.

commonly used component parts shown in a

OBLIQUE DRAWING A type of pictorial drawing in

drawing.

which one view is an orthographic projection and

SYSTEM Major functioned section of an installation.

the views of the sides have receding lines at an

SYSTEM INTERRELATION Specific individual

angle.

operations in one system affecting the operation in

ONE-LINE SKETCH Drawing using one line to

another system.

outline the general relationship of various

TITLE BLOCK A blocked area in the lower right

components to each other.

comer of a print. Provides information to identify

ONE-LINE SCHEMATIC Drawing of a system using

the drawing, its subject matter, origins, scale, and

only one line to show the tie-in of various

other data.

components; for example, the three conductors

VIEW A drawing of a side or plane of an object as seen

n e e d e d to transmit 3-phase power are

from one point.

represented by a single line.

AI-2