Sec. 25.1543 - Instrument markings: general.
For each instrument --
(a) When markings are on the cover glass
of the instrument, there must be means to maintain the correct alignment
of the glass cover with the face of the dial; and
(b) Each instrument marking must be
clearly visible to the appropriate crewmember.
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 25-72, 55 FR 29786, July 20, 1990]