Raw HYPACK navigation logs (text) collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center offshore of the Elizabeth Islands, MA, 2010

These data were collected under a cooperative agreement between the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS), Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center (WHCMSC). Initiated in 2003, the primary objective of this program is to develop regional geologic framework information for the management of coastal and marine resources. Accurate data and maps of seafloor geology are important first steps toward protecting fish habitat, delineating marine resources, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters of coastal Massachusetts, primarily in water depths of 2-30 meters. Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports (<http://woodshole.er.usgs.gov/project-pages/coastal_mass/>). The data collected in this study area located around the western extent of the Elizabeth Islands includes high resolution bathymetry, acoustic-backscatter intensity, seismic-reflection, and navigation data. These data were collected during a nearshore cruise in September 2010 onboard the R/V Rafael using the following equipment: an SEA Ltd SwathPlus interferometric sonar (234 kHz), Klein 3000 dual frequency sidescan sonar, an Edgetech 424 chirp subbottom profiling system, and 4 GPS antennae. More information about the cruise conducted as part of the project: Geologic Mapping of the Seafloor Offshore of Massachusetts can be found on the Woods Hole Coastal and Marine Science Center Field Activity webpage:
<http://quashnet.er.usgs.gov/data/2010/10003/>

本数据集由马萨诸塞州海岸带管理办公室（Massachusetts Office of Coastal Zone Management, CZM）与美国地质调查局（U.S. Geological Survey, USGS）海岸与海洋地质项目、伍兹霍尔海岸与海洋科学中心（Woods Hole Coastal and Marine Science Center, WHCMSC）通过合作协议联合采集。该项目于2003年启动，核心目标为构建区域地质框架信息，以支撑海岸与海洋资源的管理工作。精准的海底地质数据与图件，是保护鱼类栖息地、划定海洋资源范围、评估自然或人类活动引发的环境变化的首要前提。本项目聚焦马萨诸塞州沿岸近岸海域，作业水深范围主要为2至30米。本次测绘合作采集的数据已以美国地质调查局公开文件报告（USGS Open-File Reports）系列形式发布，详情可访问：<http://woodshole.er.usgs.gov/project-pages/coastal_mass/>。针对伊丽莎白群岛西侧海域研究区采集的数据涵盖高分辨率水深测量（bathymetry）、声学背散射强度、地震反射及导航数据。这批数据于2010年9月搭乘“拉斐尔号”（R/V Rafael）近海科考航次期间采集，所用设备包括：SEA有限公司SwathPlus干涉测深声呐（234 kHz）、Klein 3000双频侧扫声呐、Edgetech 424啁啾脉冲海底剖面系统，以及4台GPS天线。关于本项目相关航次——“马萨诸塞州外海海底地质测绘”的更多信息，可访问伍兹霍尔海岸与海洋科学中心野外活动网页：<http://quashnet.er.usgs.gov/data/2010/10003/>