Summary of Cuvier's beaked whale tag deployments near Cape Hatteras. Deployment duration is given in the number of days between the tag deployment and tag failure or cessation of data transmission. The number of hours of behaviour data excludes gaps and includes only recorded data, not tag life. Deep dives were considered as any dive greater than 800 m depth; shallow dives were less than 800 m depth. Age and sex were determined from photographs taken at the time of deployment; see Material and methods for details. ZcTag047 failed at an unknown point within 2 days of deployment and the data were not used in this analysis.