Seafloor images collected along OFOBS profile PS146_128-1 during RV POLARSTERN cruise PS146

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.

本批影像采集自2025年1-3月于南极威德尔海（Weddell Sea）开展的PS146科考航次，搭载平台为德国FS POLARSTERN号破冰船。本次航次旨在重返2022年PS124航次中首次拍摄到的N. ionah筑巢群落分布海域。本次搭载的OFOBS设备在摄像头下方额外加装了一圈环绕式渔网，该渔网可在海底影像中被观测到。POSIDONIA定位系统未启用，影像坐标均基于船舶实时位置解算。影像中的激光标记间距为50厘米。