The 2015 Arctic Whale Ecology Study (ARCWEST)/Chukchi Acoustics, Oceanography, and Zooplankton Study-extension (CHAOZ-X) cruise took place on board the F/V Aquila. The cruise began in Nome, AK on 8 September 2015 and ended in Dutch Harbor, AK on 28 September 2015. Chief Scientist was Dr. Catherine Berchok, and the survey team consisted of 11 scientists representing six different laboratories or institutions (for full personnel list, see Appendix 1). In summary, a total of 24 passive acoustic, 24 oceanographic, and 4 combination (oceanographic/passive acoustic) moorings were retrieved, and 20 passive acoustic, 13 oceanographic, and 4 combination moorings were redeployed. A total of 17 CTD casts were conducted, 133 sonobuoys were deployed for 24 hour passive acoustic monitoring, over 600 nm were surveyed for marine mammals, and over 900 nm were surveyed for seabirds.