Seafloor images collected along OFOBS profile PS146_119-1 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.本数据集涵盖的影像采集于2025年1-3月由德国破冰船FS POLARSTERN号执行的PS146科考航次，作业海域为南极威德尔海（Weddell Sea）。本次航次的科考目标为重新考察2022年PS124航次中首次拍摄记录的N. ionah繁殖种群栖息区域。本次航次搭载的OFOBS平台在相机下方额外加装了环绕式捕捞网，该渔网可在海底影像中被观测到。POSIDONIA定位系统未启用，影像的位置信息均基于破冰船的实时船位获取。影像中的激光标记间距为50厘米。