Oxygen, the requirements for more than 1000.

Scan beam landing system. 6-36 DEORBIT BURN 60 MIN TO TOUCHDOWN 4074 m (13 365 FT) 682 km/H (424 MPH) 4074-m (13 365-FT) ALTITUDE INITIATE PREFLARE 32 SEC TO TOUCHDOWN 3.2 km (2 MILES) TO RUNWAY 496 km/H (308 MPH) 41-m (135-FT) ALTITUDE FLARE TO 1.5 WHEELS DOWN 14 SEC TO TOUCHDOWN 335.