SpaceX reportedly ran a partial simulated catch test as Starship Booster 21 finished its landing burn

In a September 30, 2026, post, a user says SpaceX ran a partial simulated catch test by activating the pad deluge system as Starship Booster 21 completed its landing burn. The catch arms did not move. The user says the booster may have been intentionally aimed at a Gulf splashdown and expects the test to provide useful data ahead of a first Pad 2 catch on an upcoming flight.