In what block on the strip do you record the report leaving and report reaching?

The practice of recording the report leaving and report reaching occurs in Space 20 on the flight progress strip, specifically when altitude restrictions are involved. This method allows air traffic controllers to maintain organized and clear records of altitude changes and position reports. By documenting this information in the designated space, controllers can quickly access the key data that informs their decisions and helps ensure safe and efficient air traffic management.

Option A, Block 100, is typically designated for other pieces of information and does not serve the purpose of recording reports related to flight levels. Block 26 often contains information more relevant to operational statuses like route changes or flight updates, which is not the focus here. The flight progress strip itself is a broader tool that encompasses many aspects of air traffic control, but only specific spaces within it, like Space 20, are used for particular types of reports such as the ones specified in this question.