Sector display
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4-3-130
A display used with a radar set, the aerial of which is continuously rotating.
The screen, of the long persistence type, is excited only while the beam of the aerial system is within a narrow sector which can be selected at will.
Note: A sector display can be used in conjunction with either an A-scan display or a P.P.I.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
