Mammal Observations-Oregon OCS Floating Wind Farm Site

This part of the Oregon OCS Data Release presents marine mammal observations from U.S. Geological Survey (USGS) field activity 2014-607-FA in the Oregon Outer continental Shelf (OCS)Floating Wind Farm survey area. The survey was conducted using 12 hour day operations out of Charleston Harbor near Coos Bay, Oregon. The cruise plan consisted of 23 days on site split between sonar mapping and video ground truth surveying. Activities parsed out to nine days of sonar mapping, three days of video surveying, eight days of no operations due to weather, and three days mobilizing and demobilizing (table 1). Typically the Snavely would transit out to the survey area in an hour at a speed of 20 knots. Marine Mammal observations were made during the multibeam sonar mapping portion of the cruise only. Multibeam sonar operations were conducted on north or south oriented tracklines at a speed of 4 to 5 knots depending on sea state. Observations were also made on the transit out to the Floating Windfarm site.

本部分为俄勒冈州外大陆架（Outer Continental Shelf, OCS）数据发布内容，展示了美国地质调查局（U.S. Geological Survey, USGS）2014-607-FA野外作业在俄勒冈州外大陆架漂浮风电场（Floating Wind Farm）测量区域获取的海洋哺乳动物观测数据。本次测量采用每日12小时的日间作业模式，作业母港设于俄勒冈州库斯湾附近的查尔斯顿港。本次航次计划共计23天现场作业，任务分为声纳测绘与视频实地验证测量（ground truth surveying）两类：其中9天用于声纳测绘、3天用于视频测量、8天因恶劣天气停航，另有3天用于设备部署与撤装（见表1）。通常情况下，Snavely号科考船以20节的航速航行1小时即可抵达测量区域。本次海洋哺乳动物观测仅在航次的多波束声纳（multibeam sonar）测绘阶段开展。多波束声纳作业沿南北向测线实施，航速控制为4至5节，具体根据海况调整。在前往漂浮风电场场址的航渡阶段，观测工作亦同步开展。