Marine mammal sighting data from T/S Oshoro maru 2023 Arctic Cruise / C145

Marine mammal sighting data were acquired by sighting from upper bridge or bridge to study distribution of marine mammals in the Bering and Chukuchi Seas.本数据集的海洋哺乳动物（Marine mammal）目击观测数据，通过在船舶上层桥楼或桥楼区域开展目视观测采集所得，旨在研究白令海与楚科奇海域的海洋哺乳动物分布情况。