Why do depotmen wave green flags?

[PLUMB LOCO]

I'm sure there must be someone who can inform me the reason why depotmen are required to show the green flag to drivers at rural stations? This is a trick question. :D

[Thomas Ralph]

Not just rural stations, it happens on dispatched trains at Pearse and elsewhere as well. It's simply to let them know that it's safe for them to leave.

[PLUMB LOCO]

Ah ha! So how do they know if it is safe to leave unmanned stations such as Rathdrum? :D

[Mark Gleeson]

I can see any purpose in this thread, there is no passenger issue. The answer is DOO and the thread is closed