The 2024-04-01 mission was the 15th flight for the first stage booster supporting that mission, which previously launched NROL-87, NROL-85, SARah-1, SWOT, Transporter-8, Transporter-9, and nine Starlink missions.
The first stage booster supporting NROL-146 previously launched NROL-87, NROL-85, SARah-1, SWOT, Transporter-8, Transporter-9, and nine Starlink missions.
The first stage booster for NROL-146 was making its 16th flight and previously supported NROL-87, NROL-85, SARah-1, SWOT, Transporter-8, Transporter-9, and nine Starlink missions.