Block Forward

Means to dispatch a message from a block station on double line intimating to the block station immediately in advance the fact that the block section in advance is obstructed or is to be obstructed. (G.R. 1.02(9))

It is a message given, obtaining permission for shunting in block section.

It is given only on double line.

Message given for performing shunting beyond advance starter in right direction when there is no train in the section up to advance station.

Message given for performing shunting beyond LSS after clearance of the train in the next station.