Fly to a hydrogen scoop point (gas giants, deep-space). Engage scoop mode (M or hold E). Pumped H2 fills your internal tank.
Customer hails on Comms — match speed within 50m. Tractor-tube extends, transfer at 50-200 H2/sec. Both pilots monitor pressure. Disconnect mid-transfer if attacked.
Sell rate: 4-7 aUEC per H2 unit. A full Starfarer load = 1.3M-2.3M aUEC depending on demand.