CCS - MV Bluefin 2020 V01 Bioacoustics

This bio-acoustic data was collected during a December 2020 voyage on the Australian Maritime College training vessel MV Bluefin as part of the Carbon Capture and Storage project. The survey was conducted in the nearshore of the Gippsland region. See voyage report MV Bluefin 202001 Voyage Summary.docx for detailed overview of the voyage.Simrad 120 kHz bio-acoustic water column and seafloor backscatter + experimental gas-seep detection multibeamSimrad 120 kHz echosounders are part of the Bluefin’s installed instrument suite. Simrad 38 kHz was installed but not used as ws interfering with Kongsberg EM2040 multibeam. An experimental multibeam system was used on this voyage. This comprised four 28 degree transducers that were powered by 200 kHz WBT Transceiver. A custom built multiplexer was used to cycle through the four transducers. This system was used to conduct experiments with a gas-release system on the seafloor to assess utility of the system to detect the release. Data was acquired using Simrad EK80 Version 1.12 software logging at EK60 resolution. Acoustic data were recorded in UTC time. UTC offset would be 10 hrs. Echosounder detailsEchosounder | Frequency | Mode | Transceiver Serial no | Transducer Model & serial No | CommentsSimrad EK60 | 38 kHz | CW | - | ES38B, SN30333 | Not operated as was interfering with EM2040 multibeamSimrad EK60 | 120 kHz | CW | - | ES120-7C, 120\t| Simrad WBT Tube | 200 kHz | CW | - | 253687 | ES200-28. | Custom four transducer pseudo multibeam head Survey settings:Frequency (kHz) | Power | Pulse duration (ms) | Logging Range (m)120 | 125 | 1.024 | 30105 | 45 | 1.024 | 30Calibration Information:Bio-acoustic system was calibrated using the standard sphere method for survey settings on 14th of August 2020 at CCS study site. See separate calibration report for details本生物声学数据集采集于2020年12月的航行任务，搭载平台为澳大利亚海事学院训练船MV Bluefin，属于碳捕获与封存（Carbon Capture and Storage, CCS）项目的一部分。本次勘测作业在吉普斯兰（Gippsland）区域近岸海域开展，航行任务的详细概况可参阅《MV Bluefin 202001 Voyage Summary.docx》航行报告。 本次搭载的设备包括Simrad 120 kHz生物声学水体与海底后向散射探测系统，以及实验性气体渗漏检测多波束系统。 Simrad 120 kHz回声测深仪属于MV Bluefin号的标配仪器套件。Simrad 38 kHz设备虽已安装，但因与Kongsberg EM2040多波束系统存在信号干扰，未投入使用。本次航行中使用了一套实验性多波束系统，该系统由4台28度换能器组成，由200 kHz WBT收发机驱动，并通过定制化多路复用器实现4台换能器的循环切换。本系统配合海底释气系统开展实验，以评估该系统检测气体泄漏的实用性。数据采集使用Simrad EK80 Version 1.12软件，以EK60分辨率进行记录，声学数据采用协调世界时（Coordinated Universal Time, UTC）记录，时区偏移量为10小时。 ### 回声测深仪详细参数 | 回声测深仪型号 | 频率 | 工作模式 | 收发机序列号 | 换能器型号与序列号 | 备注 | | ---- | ---- | ---- | ---- | ---- | ---- | | Simrad EK60 | 38 kHz | 连续波（Continuous Wave, CW） | - | ES38B, SN30333 | 因与EM2040多波束系统存在信号干扰，未启用 | | Simrad EK60 | 120 kHz | 连续波（Continuous Wave, CW） | - | ES120-7C, 120 | - | | Simrad WBT Tube | 200 kHz | 连续波（Continuous Wave, CW） | - | 253687 | ES200-28，定制四换能器伪多波束探头 | ### 勘测参数设置 | 频率（kHz） | 发射功率 | 脉冲时长（ms） | 记录量程（m） | | ---- | ---- | ---- | ---- | | 120 | 125 | 1.024 | 30 | | 105 | 45 | 1.024 | 30 | ### 校准信息 本生物声学系统于2020年8月14日在CCS研究站点，针对本次勘测参数采用标准球体法完成校准，详细校准信息可参阅独立发布的校准报告。