Item 2, 3, 4 are noted. Thank you a lot.
Referring to item 1, I am not sure I have got your point. In short, do you mean it should be decide by the actual situation of shunt route?
If the shunt route is for a pemissive movement, it is no need to consider the overlap. Such as shunting a train to couple with another one which stop in the platform?
If it is an unpermissive movement, overlap have to be considered for safety. Such as wrong direction movement?
Also another question, I did not find much about the approach locking in Study Pack. So I checked the British Rail Control Table.
It is said "Shunt signal only become approach locked once a proceed aspect has been displayed and any berth track within 50 yards has been occupied. In the absence of a berth track, the siganl is approach locked when clear." So is it only in a shunt route, approach locked applies for signal when signal clear or TC occ? And does it require the berth track shorter than 50yard(45m)? There is only one case in that book, so I can hardly judge my reference is right or wrong.
I refer to the column in CT as attached.
Referring to item 1, I am not sure I have got your point. In short, do you mean it should be decide by the actual situation of shunt route?
If the shunt route is for a pemissive movement, it is no need to consider the overlap. Such as shunting a train to couple with another one which stop in the platform?
If it is an unpermissive movement, overlap have to be considered for safety. Such as wrong direction movement?
Also another question, I did not find much about the approach locking in Study Pack. So I checked the British Rail Control Table.
It is said "Shunt signal only become approach locked once a proceed aspect has been displayed and any berth track within 50 yards has been occupied. In the absence of a berth track, the siganl is approach locked when clear." So is it only in a shunt route, approach locked applies for signal when signal clear or TC occ? And does it require the berth track shorter than 50yard(45m)? There is only one case in that book, so I can hardly judge my reference is right or wrong.
I refer to the column in CT as attached.