Appendix I Glossary -141220091

APPENDIX I

GLOSSARY

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

functions.

drawing of the assembly or adjacent subassembly.

DIGITAL The processing of data by numerical or

ARCHITECT'S SCALE Scale used when dimen-

discrete units.

sions or measurements are to be expressed in feet

DRAWING NUMBER An identifying number

and inches.

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

projections.

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

features.

seen.

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

by lines.

immediate, timely, and correct procedural steps are

BLUEPRINTS Copies of mechanical or other types of

taken.

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.

component part.

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.

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