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Chapter 3
DEFINITIONS
3.1. Definition of Symbols
Instructions to ‘look here’ or to ‘see this part’.
Denotes movement. Instructing user to carry out action
in a specified direction.
Indicates alignment axis.
Alerts user that view has changed to a reverse angle.
3.2. Definitions of Terms
Circumferential
Direction of scan travel is around the circumference of the
pipe/tube
(Fig. 4)
.
Longitudinal
Direction of scan travel is lengthwise of the pipe/tube
(Fig. 5)
.
Fig. 4 - Circumferential scanning
Fig. 5 - Longitudinal scanning
