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 the FAO console. The Phase Specialist offers expertise for the Flight Director in specific procedures required during complex operations.

Responsible for all Orbiter data, voice and video communications systems; monitors the telemetry link between the vehicle and the ground; oversees the uplink command and control processes.

Responsible for monitoring vehicle performance during the powered flight phase and assessing abort modes; calculating orbital maneuvers and resulting trajectories; and monitoring vehicle flight profile and energy levels during reentry.

Responsible for the onboard navigational software and for Maintenance of the Orbiter's navigational state, known as the state vector.

Also known as "TRAJ," this operator aids the FDO during dynamic flight phases and is responsible for maintaining the trajectory processors in the MCC and for trajectory inputs made to the Mission Operations Computer.

{{ul|Environmental Engineer & Consumables Manager ({EECOM)}}

Responsible for all life support systems, cabin pressure, thermal control and supply and waste water management; manages consumables such as oxygen and hydrogen.

Responsible for power management, fuel cell operation, vehicle lighting and the master caution and warning system.

Coordinates all payload activities; serves as principal interface with remote payload operations facilities.

Responsible for all onboard mass memory and data processing hardware; monitors primary and backup flight software systems; manages operating routines and multi-computer configurations.