(b) The following markings must be made:
(1) A red radial line—
(i) For rotorcraft other than helicopters, at V
(ii) For helicopters, at a V
(2) A red, cross-hatched radial line at V
(3) For the caution range, a yellow arc.
(4) For the safe operating range, a green arc.
(Secs. 313(a), 601, 603, 604, and 605 of the Federal Aviation Act of 1958 (49 U.S.C. 1354(a), 1421, 1423, 1424, and 1425); and sec. 6(c), Dept. of Transportation Act (49 U.S.C. 1655(c)))
[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as amended by Amdt. 29–15, 43 FR 2327, Jan. 16, 1978; 43 FR 3900, Jan. 30, 1978; Amdt. 29–17, 43 FR 50602, Oct. 30, 1978]
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