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Old January 23, 2013, 08:28 PM   #12
Ronbert
Senior Member
 
Join Date: September 23, 2009
Location: Ft. Collins, CO.
Posts: 398
For sailors they need to be able to see what color another vessel's side lights are so as to tell geometry.
Same for pilots. They also have to read the tower light gun signals (as mentioned).

You'd think the Army guys might like to know what paint colors are on the tips of their ammo though..... trace, AP,etc
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