In the middle of June a program has been set to remove the "LDU's" from C 
class locos and transfering these units into NR's. 
Four G class locos are to be wired up for ICDU.
By the middle of July you will no longer see C class locos leading any trains 
in Victoria. So get those shutters clicking.
Also by the middle of August the BL class locos will meet the same fate.
Definition:
Wedge= MDC600 Motorola train to base radio units. Not a block of wood.
LDU's= Locomotive Display Units used for ASW working between Manor and 
Maroona.
ASW= Alternate Safe Working. Electronic Train Authorities.
ICDU= In Cab Display Unit. These are used for the ETMU, which is the End of 
Train Monitoring Unit, which displays a digital read out of the brake pipe 
pressure at the rear of the train.
Regards All 
Ron.