OPR-M328-FA-22 EXPRESS Offshore Oregon NOAA Ship Fairweather (S220) H13691 4 15 NM West of Cape Sebastian Oregon United States 20000 2022 CDR Meghan Mcgovern Basic Hydrographic Survey 2022-09-30 2022-11-11 2022-11-13 Multibeam Echo Sounder Multibeam Echo Sounder Backscatter meters UTC Pacific 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 10N, 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 Field Units) CC0-1.0 https://creativecommons.org/publicdomain/zero/1.0/ https://creativecommons.org/publicdomain/zero/1.0/legalcode These data were produced by NOAA and are in the public domain within the United States. NOAA waives any potential copyright and related rights in these data worldwide through the Creative Commons Zero 1.0 Universal Public Domain Dedication (CC0). NOAA This survey area is located in 15 NM West of Cape Sebastian, Oregon 42.484916 125.025976 41.978788 124.56309 H13691 sheet limits (in blue) overlaid onto Chart 18600 file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/Area%20Surveyed.PNG Data were acquired to the survey limits in accordance with the requirements in the Project Instructions and the 2022 NOS Hydrographic Surveys Specifications and Deliverables (HSSD). This project is being conducted in support of the Expanding Pacific Research and Exploration of Submerged Systems (EXPRESS) campaign comprised of a large and diverse team of federal and non-federal partners targeting deep water areas off of the U.S. Pacific Coast. The primary objective of this project is to collect data for surficial geology, benthic habitats, subbottom faults, geologic hazards and sedimentary processes. Data from this project will support a variety of disciplines including offshore energy projects and infrastructure, marine spatial planning, ecosystem assessments, and marine geohazards. Data from this project will also be collected to support for BOEM's Offshore Wind Energy Program. This program was created to support the White House administration's goal to deploy 30 gigawatts of offshore wind energy by 2030. NOAA and BOEM will conduct a coordinated multibeam echo sounder survey of the project area to collect bathymetry, acoustic backscatter data, and water column data. Bathymetric data from this project will be further used to update National Ocean Service (NOS) nautical charting products and improve maritime safety. This project will cover a total of 737 SNM. The entire survey is adequate to supersede previous data. All waters in survey area Complete Coverage The entirety of H13691 was acquired with complete coverage, meeting the requirements listed above and in the HSSD. See figure for an overview of coverage. H13691 survey coverage overlaid onto Chart 18600 file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/Area%20Surveyed.PNG S220 0.0 401.18 0.0 0.0 0.0 0.0 0.0 19.26 0.0 0.0 401.18 0.0 0.0 0.0 0.0 0.0 19.26 0.0 4.8 0 0 0 0 206.49 2022-11-11 2022-11-12 2022-11-13 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. S220 70.4 4.8 NOAA Ship Fairweather file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/fairweather.png MBES Kongsberg Maritime EM 712 Positioning and Attitude System Applanix POS MV 320 v5 Sound Speed System Teledyne RESON SVP 71 Conductivity, Temperature, and Depth Sensor AML Oceanographic MVP200 The equipment was installed on the survey platform as follows: S220 utilizes the Kongsberg EM 712 MBES, a POS M/V v5 system for position and attitude, SVP 70 surface sound speed sensors, and AML Oceanographic MVP 200 for conductivity, temperature, and depth (CTD) casts. Crosslines were collected, processed and compared in accordance with Section 5.2.4.2 of the HSSD. To evaluate crosslines, a surface generated via data strictly from mainscheme lines and a surface generated via data strictly from crosslines were created. From these two surfaces, a difference surface (mainscheme - crosslines = difference surface) was generated. Statistics show the mean difference between the depths derived from mainscheme data and crossline data was 0.06 meters with 95% of nodes falling within +/-1.33 meters. For the respective depths, the difference surface was compared to the allowable NOAA uncertainty standards. In total, 99.5+% of the depth differences between H13691 mainscheme and crossline data were within allowable NOAA uncertainties. Overview of H13691 Crosslines. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/XLoverview1.PNG H13691 crossline and mainscheme difference statistics. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/mainscheme_vs_XL.png The large depth variance in H13691 causes the crossline difference to be more than 5m in several places. Due to depth, this is still within the uncertainty standards. The largest differences are seen in the deepest areas with depths of approximately 1200m. The 5m depth discrepancy is approximately 0.4% of the total depth of the area and is still within uncertainty standards. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/XLoverview2.PNG ERS via VDATUM 0.018 S220 1 0.5 In addition to the usual a priori estimates of uncertainty via device models for vessel motion and VDATUM real-time and post-processed uncertainty sources were also incorporated into the depth estimates of survey H13691. Real-time uncertainties were provided via EM 712 MBES data and Applanix Delayed Heave RMS. Following post-processing of the real-time vessel motion, recomputed uncertainties of vessel roll, pitch, gyro and navigation were applied in CARIS HIPS and SIPS via a Smoothed Best Estimate of Trajectory (SBET) RMS file generated in Applanix POSPac. Concur with clarification. The MVP value that was applied to the data HDCS is at 2 m/s. H13691 junctions with 5 adjacent surveys from this project, H13206, W00433, W00442, W00443, and W00475 survey from prior projects. Data overlap between H13691 and each adjacent survey was achieved. These areas of overlap between surveys were reviewed in CARIS HIPS and SIPS by surface differencing (at equal resolutions) to assess surface agreement. The multibeam data were also examined in CARIS Subset Editor for consistency and agreement. The junctions with H13691 are generally within/exceed the NOAA allowable uncertainty in their areas of overlap, one junction survey did not meet the requirements, W00443. For all junctions with H13691, a negative difference indicates H13691 was shoaler and a positive difference indicates H13691was deeper. Overview of H13691 junction surveys. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/junctions.PNG Difference surface between H13691 and junctioning survey H13206. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/H13206.PNG Difference statistics between H13691 and junctioning survey H13206. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/H13691_MB_VR_MLLW-H13206_MB_VR_MLLW_depth_delta.png W00433 10000 2017 E/V Nautilus N Surface differencing in CARIS HIPS and SIPS was used to assess junction agreement between the surface from H13691and the surface from W00433. The statistical analysis of the difference surface shows a mean of 4.80 meters with 95% of the nodes having a maximum deviation of +/- 14.23 meters. It was found that 100% of nodes are within NOAA allowable uncertainty. Difference surface between H13691 and junctioning survey W00433. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/W00433.PNG Difference surface statistics between H13691 and W00433. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/H13691_MB_VR_MLLW-W00433_MB_128m_MLLW_depth_delta.png W00442 10000 2016 E/V Nautilus W Surface differencing in CARIS HIPS and SIPS was used to assess junction agreement between the surface from H13691and the surface from W00442. The statistical analysis of the difference surface shows a mean of 2.14 meters with 95% of the nodes having a maximum deviation of +/- 9.96 meters. It was found that 99.5% of nodes are within NOAA allowable uncertainty. Difference surface between H13691 and junctioning survey W00442. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/W00442.PNG Difference surface statistics between H13691 and W00442. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/H13691_MB_VR_MLLW-W00442_MB_128m_MLLW_depth_delta.png W00443 10000 2017 E/V Nautilus W Surface differencing in CARIS HIPS and SIPS was used to assess junction agreement between the surface from H13691and the surface from W00443. The statistical analysis of the difference surface shows a mean of -2.36 meters with 95% of the nodes having a maximum deviation of +/- 10.53 meters. It was found that 84% of nodes are within NOAA allowable uncertainty. Survey W00443 was given a CATZOC B rating and generally has a larger range of uncertainty values than the other junction surveys. A larger deviation between H13691 and W00443 is expected. Difference surface between H13691 and junctioning survey W00443. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/W00443.PNG Difference surface statistics between H13691 and W00443. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/H13691_MB_VR_MLLW-W00443_MB_128m_MLLW_depth_delta.png Difference surface compliance with NOAA allowable uncertainty between H13691 and junctioning survey W00443. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/W00443_additionalpics.PNG W00475 80000 2019 NOAA Ship Fairweather W Surface differencing in CARIS HIPS and SIPS was used to assess junction agreement between the surface from H13691and the surface from W00475. The statistical analysis of the difference surface shows a mean of 0.45 meters with 95% of the nodes having a maximum deviation of +/- 2.02 meters. It was found that 99.5% of nodes are within NOAA allowable uncertainty. Difference surface between H13691 and junctioning survey W00475. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/W00475.PNG Difference surface statistics between H13691 and W00475. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/H13691_MB_VR_MLLW-W00475_MB_VR_MLLW_depth_delta.png Sonar system quality control checks were conducted as detailed in the quality control section of the DAPR. EM712 Depth Mode An integration issue of this new sonar system restricted the SIS runtime parameters to "very shallow", "shallow", and "medium" but without capability to use "deep" parameter. Surveying in waters with depths over 1000m in "medium" depth mode created gaps in coverage that were unavoidable at the time of survey. None Exist There were no other factors that affected corrections to soundings. MVP casts on S220 were conducted at an average interval of 4 hours, guided by observation of the surface sound speed and targeted to deeper areas. All MVP casts were taken at minimum interval requirements because all casts had to be taken with manual control, due to equipment malfunction, with a limited schedule based on safe manning with limited staffing. All sound speed methods were used as detailed in the DAPR. Location of all SVP casts for H13691 file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/SVP.PNG All equipment and survey methods were used as detailed in the DAPR. Holidays H13691 data were reviewed in CARIS HIPS and SIPS for holidays in accordance with Section 5.2.2.3 of the HSSD. 16 holidays which meet the definition described in the HSSD for complete coverage were identified via HydrOffice QC Tools Holiday Finder tool. This tool automatically scans the surface for holidays as defined in the HSSD and was run in conjunction with a visual inspection of the surface by the hydrographer. Holidays and gaps in coverage were mainly caused by sonar issues while testing the EM712 sonar in depths greater than 1000m. Reasonable attempts to cover all gaps in coverage were made, including slowing down, forcing depth, and manually adjusting depth mode. Holidays present in H13691 file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/Holiday.PNG Holidays in H13691 file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/close%20up%20holiday.PNG Fliers H13691 data were reviewed in CARIS HIPS and SIPS for fliers in accordance with the HSSD. 68 fliers were identified via HydrOffice QC Tools Flier Finder tool. This tool automatically scans the surface for fliers as defined in the HSSD and was run in conjunction with a visual inspection of the surface by the hydrographer. These fliers were either deemed to be actual representation of the sea floor, or caused by the gaps in coverage. The majority of fliers flagged, are due to the holes in coverage while using the EM712 sonar in deeper water. Example of area where low density created gaps in coverage and are flagged as fliers in H13691. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/flier%20example.PNG NOAA Allowable Uncertainty The surface was analyzed using the HydrOffice QC Tools Grid QA feature to determine compliance with specifications. Overall, 99% of nodes within the surface meet NOAA Allowable Uncertainty specifications for H13691. H13691 allowable uncertainty statistics file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/grid%20QA%20uncertainty.png Density The surface was analyzed using the HydrOffice QC Tools Grid QA feature to determine compliance with specifications. Density requirements for H13691 were achieved with at least 99% of surface nodes containing five or more soundings as required by HSSD Section 5.2.2.3 Density requirements were not reached in all areas of the survey. This was due to the surveyed depths of up to over 1000m in "medium" depth mode, creating holidays and gaps in coverage. Time restraints and weather conditions did not allow survey operations to continue to cover the holidays and density gaps. H13691 data density statistics file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/grid%20QA%20density.png All data reduction procedures conform to those detailed in the DAPR. All sounding systems were calibrated as detailed in the DAPR. Raw backscatter data were stored in the .kmall file for Kongsberg systems. All backscatter were processed to GSF files and a floating point mosaic was created by the field unit via Fledermaus FMGT 7.10.2. See Figure below for a greyscale representation of the complete mosaic. A single backscatter mosaic was created at 6m resolution based on the specifications for a 100kHz system. All equipment and survey methods were used as detailed in the DAPR. Backscatter mosaic for H13691. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/backscatter.PNG CARIS HIPS and SIPS 11.3 QPS Fledermaus 7.10.2 NOAA Profile Version 2022 H13691_MB_VR_MLLW_final CARIS VR Surface (CUBE) Variable Resolution 95.9 1469.07 NOAA_VR Complete MBES H13691_MB_VR_MLLW CARIS Raster Surface (CUBE) Variable Resolution 95.8 1470.9 NOAA_VR Complete MBES The NOAA CUBE parameters defined in the HSSD were used for the creation of all CUBE surfaces for H13691. The surfaces have been reviewed where noisy data, or "fliers" are incorporated into the gridded solutions causing the surface to be shoaler or deeper than the true sea floor. Where these spurious soundings cause the gridded surface to vary from the reliably measured seabed by greater than the maximum allowable Total Vertical Uncertainty at that depth, the noisy data have been rejected by the hydrographer and the surface recomputed. Flier Finder, part of the QC Tools package within HydrOffice, was used to assist the search for spurious soundings following gross cleaning. Flier Finder was run iteratively until all remaining flagged fliers were deemed to be valid aspects of the surface. 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 VDatumPolygon_1_100m_NAD83-MLLW_geoid12b ERS methods were used as the final means of reducing H13691 to MLLW for submission. North American Datum 1983 Projected UTM 10 RTX Vessel kinematic data were post-processed using Applanix POSPac processing software and RTX positioning methods described in the DAPR. Smoothed Best Estimate of Trajectory (SBET) and associated error (RMS) data were applied to all MBES data in CARIS HIPS and SIPS. The Wide Area Augmentation System (WAAS) was used for real-time horizontal control during data acquisition. Chart comparison between ENC and soundings from collected data. The soundings from H13691 are generally in agreement with the charted soundings of ENC US3OR03M. Survey outline with soundings (in black) overlaid with coverage onto ENC US3OR03M. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/chart%20comp%20overview.PNG Survey outline with soundings (in black) overlaid with coverage onto ENC US3OR03M. file:///M:/OPRM328FA22/Surveys/H13691/06_Processed/Reports/Survey/Descriptive_Report/Report/Images/chart%20comp%20zoomed.PNG US3OR03M 196948 25 2022-01-20 2022-06-02 No shoals or potentially hazardous features exist for this survey. No charted features exist for this survey. No uncharted features exist for this survey. No channels exist within the survey limits. No Aids to navigation (ATONs) exist for this survey. No Maritime Boundary Points were assigned for this survey. No bottom samples were required for this survey. No overhead features exist for this survey. No submarine features exist for this survey. No platforms exist for this survey. No ferry routes or terminals exist for this survey. 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. CDR Meghan McGovern Commanding Officer 2023-04-16 LTJG Taylor Alan Krabiel Operations Officer 2023-04-16 HST Sara Ober Sheet Manager 2023-04-16