JNCC Seabirds at Sea data: Effort related seabird observation data collected from boats, to ESAS methodology

Raw effort related seabird at sea observation data collected using the 'ESAS' method by JNCC from boats, pertaining to seabirds and cetaceans at sea. Additional information is provided in the following publication: Camphuysen, K.J., Fox, A.D., Leopold, M.F. & Petersen, I.K. 2004. Towards standardised seabirds at sea census techniques in connection with environmental impact assessments for offshore wind farms in the U.K.: a comparison of ship and aerial sampling methods for marine birds, and their applicability to offshore wind farm assessments (PDF, 2.7 mb), NIOZ report to COWRIE (BAM – 02-2002), Texel, 37pp. [https://tethys.pnnl.gov/sites/default/files/publications/Camphuysen-et-al-2004-COWRIE.pdf](https://tethys.pnnl.gov/sites/default/files/publications/Camphuysen-et-al-2004-COWRIE.pdf)