OPR-B315-KR-22 Approaches to Newport, RI Rhode Island Sound Ocean Surveys H13657 1 East of Scarborough Hill Rhode Island United States 7500 2022 John R. Bean Navigable Area 2022-06-13 2022-07-13 2022-08-29 Multibeam Echo Sounder Multibeam Echo Sounder Backscatter meters UTC Atlantic Hydrographic Branch Any revisions to the Descriptive Report (DR) applied during office processing are shown in red italic text. The DR is maintained as a field unit product, therefore all information and recommendations within this report are considered preliminary unless otherwise noted. The final disposition of survey data is represented in the NOAA nautical chart products. All pertinent records for this survey are archived at the National Centers for Environmental Information (NCEI) and can be retrieved via https://www.ncei.noaa.gov/. Products created during office processing were generated in NAD83 UTM 19N, MLLW. All references to other horizontal or vertical datums in this report are applicable to the processed hydrographic data provided by the field unit. CC0-1.0 (NOAA Contractors) CC0-1.0 https://creativecommons.org/publicdomain/zero/1.0/ https://creativecommons.org/publicdomain/zero/1.0/legalcode These data were produced under contract with NOAA and any potential copyright was assigned to NOAA. NOAA waives any potential copyright and related rights in these data worldwide through the Creative Commons Zero 1.0 Universal Public Domain Dedication (CC0). Contractor This survey provides hydrographic data for waters approaching Newport, RI. The general locations of the survey limits are presented in Table 1. 41.444818999999995 71.503823 41.293296999999995 71.36880699999999 Survey limits were acquired in accordance with the requirements in the Project Instructions and the HSSD. The following text is quoted from the Purpose and Location section of the Project Instructions: The Approaches to Newport, RI project covers an area of 210 Square Nautical Miles (SNM), that connects Narragansett Bay, Block Island Sound, Buzzards Bay, and Vineyard Sound. This survey area serves as a major route for cargo, tanker, recreational and commercial fishing, and pleasure vessels transiting through the area. The Ports of Davisville, Providence, and New Bedford, are some of the busiest ports in New England serving international and domestic trade. These ports support automotive transportation, seafood and other cold storage, petroleum products, and construction materials and equipment. Commercial fishing, transportation and recreation are major activities in the area, with the Port of Galilee in Narragansett serving as the home port for many charter fishing vessels and sightseeing tours. Additionally, it serves as a major hub for year round ferry service to Block Island providing an essential transportation link to the island and the community of New Shoreham. The Cities of Newport, Wickford, Warwick and other cities in the vicinity of the survey area are well known for their sailing and recreational boating activities. Events such as the annual Newport Regatta bring national and international recognition for the competitive sailing that takes place in the area. The available bathymetric data in the survey area is almost all over a century old, with the most recent survey conducted in the 1930's. The bathymetric and feature data acquired as part of this project will be used to update National Ocean Service nautical charting products and services as well as support the Seabed 2030 global initiative. The survey data from this project is intended to supersede all prior survey data in the common area. The entire survey is adequate to supersede previous data. All waters in survey area Complete Coverage (Refer to HSSD Section 5.2.2.3) Survey coverage was in accordance with the requirements listed above and in the HSSD. Survey H13657 coverage overlaid on a composite of RNCs. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657-overview.JPG MV Northstar Challenger 0.0 370.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 RV North Cove 0.0 600.0 0.0 0.0 0.0 0.0 0.0 38.6 0.0 0.0 970.4 0.0 0.0 0.0 0.0 0.0 38.6 0.0 4.0 4 0 0 0 28.89 2022-07-13 2022-07-14 2022-07-15 2022-07-16 2022-07-17 2022-07-18 2022-07-20 2022-07-21 2022-07-23 2022-07-27 2022-07-28 2022-07-29 2022-07-30 2022-07-31 2022-08-01 2022-08-03 2022-08-04 2022-08-10 2022-08-12 2022-08-13 2022-08-15 2022-08-18 2022-08-19 2022-08-23 2022-08-24 2022-08-25 2022-08-27 2022-08-28 2022-08-29 Refer to the Data Acquisition and Processing Report (DAPR) for a complete description of data acquisition and processing systems, survey vessels, quality control procedures, and data processing methods. Additional information to supplement sounding and survey data, and any deviations from the DAPR, are discussed in the following sections. MV Northstar Challenger 28.0 2.6 RV North Cove 11.1 0.8 MV Northstar Challenger configured for survey operations. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/CH_overview.jpg RV North Cove configured for survey operations. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/NC_overview.jpg MBES Teledyne RESON SeaBat T50-R Positioning and Attitude System Applanix POS MV 320 v5 Positioning System Trimble NetR9 Conductivity, Temperature, and Depth Sensor AML Oceanographic AML-3 LGR Conductivity, Temperature, and Depth Sensor AML Oceanographic MVP30-350 Sound Speed System AML Oceanographic Micro SV-Xchange Lidar System Velodyne LiDAR VLP-16 Crossline mileage in Survey H13657 totaled 4.0% of the mainscheme survey miles. Agreement between crosslines and mainscheme bathymetry was very good, with a mean difference of 0.01m. Most discrepancies were found in outer beam data on the edge of crosslines, primarily in deeper water. Differences near shore were found in rocky areas. H13657 crossline tracks overlaid on a coverage surface. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657-XL.JPG Depth differences between H13657 mainscheme and crossline data. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657_MB_2m_MLLW_Main-H13657_MB_2m_MLLW_XL_depth_delta.png ERS via VDATUM 0.0 0.104 MV Northstar Challenger 2 1 RV North Cove 2 1 The HydrOffice "QC Tools" application was used to calculate TVU QC, determined by a ratio of uncertainty to the allowable error per NOAA and IHO specifications. Two surfaces (1m resolution for depths under 20m and 2m resolution for depths 18m to 40m) were finalized in CARIS HIPS using the "uncertainty" option to select the combination of a priori and realtime uncertainty estimates as the surface TVU source. The surfaces passed the uncertainty check, with 100% of nodes meeting the uncertainty standards. H13657 MBES 1m surface uncertainty standards. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657_MB_1m_MLLW_Final.QAv6.tvu_qc.png H13657 MBES 2m surface uncertainty standards. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657_MB_2m_MLLW_Final.QAv6.tvu_qc.png Survey H13657 junctions with 3 prior surveys and 2 contemporary surveys. Survey H13657 junction map with junction area depth differences. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657-Junction.JPG H12011 20000 2009 Thomas Jefferson W Surveys H13657 and H12011 share a border of approximately 9.5km in length that follows the southern end of Survey H13657. The junction is L-shaped with a north-south section and an east-west section of about equal lengths. The north-south section of the junction loosely follows the edge of a drop off in the bathymetry, and the discrepancies between the two surveys are greatest along this edge. The shoaler east-west section of the junction area has better agreement between Survey H13657 and H12011. The mean depth difference between the two surveys was 0.13m. The junction comparison from the HydrOffice "Compare Grids" tool calculated that 99.5+% of comparison nodes were within the allowable error fraction. Depth differences between Surveys H13657 and H12011. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657_MB_2m_MLLW-H12011_MB_VR_MLLW_2m_depth_delta.png H12023 20000 2009 Thomas Jefferson W The border between Surveys H13657 and H12023 is approximately 6.3km long and runs along the southwestern edge of Survey H13657. The mean depth difference between the two surveys was 0.18m with most discrepancies found in rocky areas closer to shore, in the northern end of the junction area. The survey junction comparison from the HydrOffice "Compare Grids" tool calculated that 98% of comparison nodes were within the allowable error fraction. Depth differences between Surveys H13657 and H12023. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657_MB_2m_MLLW-H12023_MBVB_4m_MLLW_combined_depth_delta.png H12324 10000 2011 NRT5 NW The border between Surveys H13657 and H12324 is approximately 10.9km long and follows the northern limit of Survey H13657. The mean depth difference between the two surveys was 0.00m with most discrepancies found across distinct shoal rock areas. The survey junction comparison from the HydrOffice "Compare Grids" tool calculated that 99% of comparison nodes were within the allowable error fraction. Depth differences between Surveys H13657 and H12324. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657_MB_2m_MLLW-H12324_MB_4m_MLLW_combined_depth_delta.png H13658 10000 2022 Ocean Surveys, Inc. E The border between Surveys H13657 and H13658 is approximately 9.0km long and follows the northern part of Survey H13657's eastern edge. The mean depth difference between the two surveys was 0.03m with no geographic pattern to the discrepancies. The survey junction comparison from the HydrOffice "Compare Grids" tool calculated that 99.5+% of comparison nodes were within the allowable error fraction. Depth differences between Surveys H13657 and H13658. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657_MB_2m_MLLW-H13658_MB_2m_MLLW_depth_delta.png H13663 40000 2022 Ocean Surveys, Inc. SE The border between Surveys H13657 and H13663 is approximately 7.0km long and follows the southern part of Survey H13657's eastern edge. The mean depth difference between the two surveys was 0.04m with no geographic pattern to the discrepancies. The survey junction comparison from the HydrOffice "Compare Grids" tool calculated that 99.5+% of comparison nodes were within the allowable error fraction. Depth differences between Surveys H13657 and H13663. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657_MB_2m_MLLW-H13663_MB_2m_MLLW_depth_delta.png Sonar system quality control checks were conducted as detailed in the quality control section of the DAPR. None Exist There were no conditions or deficiencies that affected equipment operational effectiveness. Sound Speed Variation Sound speed variations were observed throughout the survey area, correlating to factors including the tide, weather, water depth, and bathymetric features, such as slopes or sand waves. In data processing, sound speed profiles that did not adequately reflect the surrounding water mass were identified and removed, edited, or replaced. Sound speed casts were primarily applied using the CARIS HIPS "Nearest in Distance within Time" method, therefore, removing a profile collected on a steep slope would allow deeper and shoaler casts on either side to be applied instead. Casts that were empirically found to represent a large water zone were added at additional locations within that zone to ensure proper corrections given the cast selection options available in the CARIS sound speed tools. Bathymetry, uncertainty, and standard deviation surfaces were used to direct editing and determine the accuracy of sound speed cast selection. MVP casts were taken at intervals of approximately 20 minutes on the MV Northstar Challenger. AML-3 casts were taken approximately every 1-2 hours on the RV North Cove. Hydrographers acquired more frequent sound speed profiles if high variability was noted in the surface sound speed from the AML Micro-X installed on the head of the transducer, or when the surface sound speed comparison threshold was exceeded (>2m/s change) between the profile reading at the draft of the transducer and the Micro-X. OSI submitted sound speed data in NetCDF format to the National Centers for Environmental Information (NCEI) on February 10, 2023 via the SN2 tool. Sound speed casts in Survey H13657. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657-SVP.JPG This survey was conducted to achieve Complete Coverage with multibeam, as specified in HSSD 5.2.2.3, Option A. This calls for 100% bathymetric bottom coverage with multibeam sonars, and complete coverage multibeam developments of features. The survey methods used to meet coverage requirements did not deviate from those described in the DAPR. The HydrOffice "QC Tools" application was used to verify that the grid nodes met the density coverage requirements, with 99.5+% of the nodes meeting the requirement. H13657 MBES 1m surface data density statistics. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657_MB_1m_MLLW_Final.QAv6.density.png H13657 MBES 2m surface data density statistics. file:///Q:/OPR-B315-KR-22/Surveys/H13657/01_HDR/Reports/Descriptive_Report/SupportFiles/H13657_MB_2m_MLLW_Final.QAv6.density.png All data reduction procedures conform to those detailed in the DAPR. All sounding systems were calibrated as detailed in the DAPR. All equipment and survey methods were used as detailed in the DAPR. NOAA Profile Version 2022 H13657_MB_1m_MLLW_Final.csar CARIS Raster Surface (CUBE) 1 0.357 20.0 NOAA_1m Complete MBES H13657_MB_2m_MLLW_Final.csar CARIS Raster Surface (CUBE) 2 18.0 34.693 NOAA_2m Complete MBES H13657_MB_1m_MLLW.csar CARIS Raster Surface (CUBE) 1 0.357 34.748 NOAA_1m Complete MBES H13657_MB_2m_MLLW.csar CARIS Raster Surface (CUBE) 2 0.357 34.693 NOAA_2m Complete MBES H13657_MBAB_2m_400kHz_1of1.tif MB Backscatter Mosaic 2 N/A Processed Backscatter Additional information discussing the vertical or horizontal control for this survey can be found in the accompanying HVCR. Mean Lower Low Water ERS via VDATUM OPR-B315-KR-22_VDATUM_Coverage_100m_NAD83-MHW_geoid12b.csar OPR-B315-KR-22_VDATUM_Coverage_100m_NAD83-MLLW_geoid12b.csar North American Datum 1983 Projected UTM 19 Smart Base DARTMOUTH MADA U OF RI COOP URIL MANT NANTUCKET MANT FALMOUTH MAFA MAWR WRENTHAM MAWR RIVERHEAD NYRH PLYMOUTH MAPL NEW YORK WAAS 1 ZNY1 Ocean Surveys Sachuset (Second) Beach OSSB US4MA23M 80000 43 2022-02-02 2022-12-28 US5PVDAB 20000 2 2022-08-25 2022-08-25 US5PVDBB 10000 2 2022-09-12 2022-09-12 US5PVDBC 20000 2 2022-08-24 2022-08-24 US5PVDCC 20000 3 2022-12-09 2022-12-09 US5PVDCD 20000 2 2022-08-12 2022-08-12 US5RI10M 40000 20 2022-06-06 2022-06-06 US5RI20M 40000 25 2022-06-21 2022-06-21 A rock outcrop that was notably shoaler than charted depths was submitted as a DTON for Survey H13657. It has since been added to the chart. No other hazardous shoals or features were surveyed. Charted features in Survey H13657 included 19 land areas, 38 obstructions, 13 seabed areas, 177 rocks, and 7 wrecks. The majority of the charted features were inshore of the NALL and not investigated. The investigated obstructions were primarily found to be rocks and were represented in the bathymetry grid, along with the charted rocks. Of the charted wrecks, 4 were surveyed near their charted position, 2 were disproved, and 1 was inshore of the NALL. 29 new features exist, see H13657 Final Feature File. No channels exist within the survey limits. ATONS within Survey H13657 were found to be on station and watching properly. No Maritime Boundary Points were assigned for this survey. Survey H13657 had 4 bottom samples assigned, 3 of which had sand as the primary constituent and 1 was primarily mud. No overhead features exist for this survey. A submarine cable charted as multiple segments and 2 short sewer pipes were assigned in Survey H13657. The sewer pipe positions are visible as linear features in the MB surface, however the pipes do not appear exposed and are therefore not included in a Non-DTON Seeps and Pipeline Report. The cable was not exposed in the survey area. No platforms exist for this survey. A seasonal ferry between Newport, RI and Block Island, RI passes through Survey H13657, as does a seasonal ferry between North Kingstown, RI and Martha's Vineyard, MA. No ferry terminals are within the survey limits. Ferry routes were not investigated by the field crew. No abnormal seafloor or environmental conditions exist for this survey. No present or planned construction or dredging exist within the survey limits. No new surveys or further investigations are recommended for this area. No new ENC scales are recommended for this area. As Chief of Party, field operations for this hydrographic survey were conducted under my direct supervision, with frequent personal checks of progress and adequacy. I have reviewed the attached survey data and reports. All field sheets, this Descriptive Report, and all accompanying records and data are approved. All records are forwarded for final review and processing to the Processing Branch. The survey data meets or exceeds requirements as set forth in the NOS Hydrographic Surveys Specifications and Deliverables, Field Procedures Manual, Letter Instructions, and all HSD Technical Directives. These data are adequate to supersede charted data in their common areas. This survey is complete and no additional work is required with the exception of deficiencies noted in the Descriptive Report. John R. Bean Chief of Party 2023-02-23 David T. Somers Data Processing Manager 2023-02-23