Proposals to use AAOmega are accepted for either visitor mode or service mode observing. See Applying for time on the AAT for more information on the application process.
Before preparing an AAOmega proposal, interested astronomers should review "Part I: Overview of 2dF and AAOmega" of the 2dF-AAOmega Manual. That section provides all the necessary information to decide if AAOmega is suitable for a particular science case and to prepare an observing proposal. In addition to the printable manual, there are interactive tools available from the tabs on this page including a grating calculator and an Integration Time Calculator (ITC).