Ocean Floor Observation and Bathymetry System (OFOBS) seafloor images of the Central Arctic Ocean collected during RV POLARSTERN cruise PS138

During the RV POLARSTERN cruise PS138 (2023-08-03 to 2023-09-30) to the Central Arctic Ocean the Ocean Floor Observation and Bathymetry System (OFOBS) was used to collect still and video images from various locations surveyed during the expedition. The OFOBS consisted of a towed underwater camera system equipped with a high-resolution photo-camera (iSiTEC, CANON EOS 5D Mark III) and a high-definition video-camera (iSiTEC, Sony FCB-H11) as well as an integrated sidescan sonar system. The cameras are mounted on a steel frame (140 L x 92 W x 135 H cm), together with two strobe lights (iSiTEC UW-Blitz 250, TTL driven), three laser pointers spaced with a distance of 50 cm used to estimate the size of seafloor strcutures, four LED lights, and a USBL positioning system (Posidonia) to track the position of the OFOBS during deployments, with additional positioning information provided by the integrated INS and DVL systems. […]

在RV POLARSTERN执行PS138巡航任务（2023年8月3日至2023年9月30日）期间，对中央北极洋进行考察时，海洋底部观测与测深系统（OFOBS）被用于收集考察期间在多个考察地点获得的静态图像和视频图像。该OFOBS包括一套拖曳式水下摄像头系统，该系统配备了一台高分辨率相机（iSiTEC，CANON EOS 5D Mark III）和一台高清摄像机（iSiTEC，Sony FCB-H11），以及一套集成侧扫声纳系统。摄像头安装在钢制框架（长140厘米、宽92厘米、高135厘米）上，配有两组闪光灯（iSiTEC UW-Blitz 250，TTL驱动），三台间隔50厘米的激光笔用于估计海底结构的大小，四盏LED灯，以及一套USBL定位系统（Posidonia）用于在部署期间跟踪OFOBS的位置，同时，集成惯性导航系统（INS）和测速深度计（DVL）系统提供了额外的定位信息。