Alarm on railways.

XXX: Pins, and what does the blue lights mean? Usually red is not, yellow is possible, but the next red, green is possible. This blue
YYY: This is maneuverable, for heaters. Blue - can not perform manoeuvres. There is still "Moon-White" - it is possible to conduct manoeuvres
XXX: What manoeuvres, fucking, barrel what?