The GO-SHIP Repeat Hydrography Manual: A Collection of Expert Reports and Guidelines provides detailed instructions for the high quality collection and analysis techniques of numerous ocean parameters. The manual addresses both physical and biogeochemical parameters. Sixteen chapters covering CTD methods, discrete samples, and underway measurements have been reviewed and revised by more than 50 experts in field oceanography. Chapters have been through a period of open community review and comment and have also been reviewed through an informal peer-review process.