It is a signal to indicate that everything is all right with the moving train given by holding out a green flag horizontally during day and waving a green light horizontally during night.
Occasions
It is exchanged between station staff and crew on both sides of the train inside the station limits and between GDR outside the station limits.
Cabins in large yards where frequent shunting takes place shall not exhibit any signal unless anything unusual is noticed.
When a train is running through a station the all right signal is exchanged between SM and GDR.
The all right signal is to be acknowledged by the Loco pilot by given one long whistle.
It is exchanged between GDR in the following cases.
a) After restarting the train from the station and midsection.
b) After the train has passed safe over the summit of ghat.
c) After clearing the work spot, tunnel and such other places required.
Loco pilots/Guards of trains provided with AC loco cab/SLR shall show the all right signal to station staff by switching on the flickering light/tail light and confirm by speaking on telephone.
If the GDR of a pass through train fails to exchange All right signal with SM/station staff on both sides, the train shall be stopped at the next block station, treating it as a run away train.
If the Loco pilot does not receive the All right signal from the guard he shall call for it by giving two short sharp whistles and even then All right signal is not received he shall stop the train and ascertain the cause.
