Fine-scale catch, effort and biological data from trawl surveys should be submitted to the Secretariat by email (data [at] ccamlr [dot] org) on completion of each survey (Medida de conservación 24-01). These data are reported on a haul-by-haul basis and are referred to as 'C4 data'. The data form includes a user guide and further information is available from the Secretariat.