PN
Without PN
Both
None of these
Answer is Right!
Answer is Wrong!
The correct answer is: A. PN
When the train enters the block section without ATP, to permit to start the Train, SM to issue restarting memo with PN.
PN stands for “Power Notification”. It is a message that is sent from the train to the signaller to indicate that the train has power and is ready to proceed. The signaller will then issue a “Clear to Proceed” signal, allowing the train to enter the block section.
Without PN, the train will not be able to enter the block section and will have to wait until the signaller issues a “Clear to Proceed” signal.
The other options are incorrect because they do not provide the necessary information to permit the train to start.