Horizontal and vertical movement data derived from a data storage tag deployed on a single Atlantic cod in the North Sea from 2001 to 2002 dataset https://portal.medin.org.uk/portal/start.php?tpc=009_CEFAS1ccd8d8e-5aae-4cd7-88e3-cfb233339f92 This data is derived from the deployment of a single data storage tag on an Atlantic cod (*Gadus morhua*) in the English Channel. The cod was tagged in the North Sea on 03/04/2001 and was recaptured in the North Sea on the 06/02/2002. The cod migrates north from the tagging location off Lowestoft, and spends the summer off the north-east coast of the UK, north of the Dogger Bank. The dataset contains 309 days of data, and comprises three files: depth measurements at a 10 minute sampling rate for the full record, depth measurements at a 10 sampling rate for July 2001, and estimates of horizontal position for each day. 20240925 20240925