Artemis II countdown continues: working to resolve communication with the flight termination system

 5 p.m.

Although the countdown to today’s Artemis II launch is continuing to progress, the Eastern Range has identified an issue that they are currently working to resolve related to their communication with the flight termination system. The flight termination system is a safety system that allows engineers on the ground to send a signal to destruct the rocket if it were to veer off course during ascent, to protect public safety. Without assurance that this system would work if needed, today’s launch would be no-go. However, engineers have devised a way to verify the system and are currently preparing to test this solution.

https://www.nasa.gov/blogs/missions/2026/04/01/live-artemis-ii-launch-day-updates/