Seafloor images collected along OFOBS profile PS146_120-1 during RV POLARSTERN cruise PS146@en

These images were acquired during the expedition PS146 with the German ice breaker FS POLARSTERN in January-March 2025, in the Weddell Sea Antarctic Ocean. The aim was to revisit the nesting N. ionah colony region first filmed during PS124 in 2022. The OFOBS was additionally equipped with a circumference fishing net below the camera which was visible on the seafloor images. The POSIDONIA positioning system was not in use and image positions were based on the ship's position. The laser markers are spaced 50 cm apart.本批图像采集自2025年1月至3月期间，搭载德国破冰船FS POLARSTERN的PS146科考航次，作业海域为南极威德尔海。本次航次旨在重返2022年PS124航次中首次拍摄到的N. ionah筑巢群落海域。观测系统OFOBS的摄像头下方额外加装了环绕式捕捞网，该装置可在海底观测图像中显现。本次任务未启用POSIDONIA定位系统，图像的定位信息均基于科考船的实时位置。激光标记点之间的间距为50厘米。