113.35-5—Electric engine order telegraph systems.
(a)
Each electric engine order telegraph system must have transmitters and indicators that are electrically connected to each other.
(c)
There must be an audible signal at each instrument. The signal at both locations must sound continuously when the transmitter and the indicator do not show the same order.
[CGD 74-125A, 47 FR 15272, Apr. 8, 1982, as amended by CGD 94-108, 61 FR 28290, June 4, 1996]