Required use of Mars light?

PRR ManOGR Forum Member

I've done some searching but came up with precious little info about the use of a Mars light during operation and how it was regulated by rules. Perhaps some of the trainmen here can discuss which circumstances would require (or not) a Mars light's use.

The only reference I found was specifically for the Great Northern:

http://www.gngoat.org/si_page_22.htm

(continued on 2 pages)

My interest stems from the DLW and the upper mounted Mars in some cab units.

EDIT: I should be more specific. I'm looking for 1950's operating rules.

Thanks in advance.

4/17/131:18 PM

Original Post

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