Which block on an enroute strip contains the center-estimated time over the fix?

The center-estimated time over the fix is crucial for air traffic controllers as it provides an expected time for an aircraft to reach a specific point in its journey, which helps in efficient traffic management and ensuring safe separation between aircraft. On an enroute strip, this information is documented in Block 15. This block is specifically designated for data related to estimated time over significant navigation fixes, allowing controllers to manage and coordinate the flow of air traffic effectively. The accurate representation of this estimated time includes considerations for weather, air traffic, and the aircraft's performance, which all contribute to more informed decision-making in air traffic control operations.