My observation of loco interchange at RMM station on 20/04/14:
I think there is loco interchange in RMM station..Two days back ERS WDM 3A hauled MDU-RMM passenger and from RMM it was given to RMM-MS Boatmail.
Similarly the incoming MS-RMM Boatmail was hauled by WDP 3A and it was given to RMM-MS Sethu Exp from RMM.
The incoming MS-RMM Sethu was hauled by...
more... WDM 3A and it was given to RMM-TPJ Passenger.
TPJ-RMM was hauled by WDM 2 and it was given to RMM-MDU passenger.