Navigable Area 2022 F00872 Florida Offshore of Florida Approaches to Tampa Bay 10000 2022-10-02 2022-10-04 2022-10-24 S-J322-KR-22 Geodynamics David J. Bernstein, CH, PLS, GISP MBES Kongsberg Maritime EM 2040C SSS EdgeTech 4205 Atlantic Hydrographic Branch meters 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 17N, MLLW. All references to other horizontal or vertical datums in this report are applicable to the processed hydrographic data provided by the field unit. North American Datum 1983 Mean Lower Low Water VDatum Projected UTM 17 2022-11-30 Geodynamics conducted a hydrographic survey in the assigned area of F00872 in the approaches to Tampa Bay, Florida. Within F00872, all survey operations were conducted in accordance with the provided SOW, Hydrographic Survey PI, and the March 2022 NOS HSSD. Any deviations from the aforementioned guidelines have been approved by the NOAA HSD operations branch and are documented in the survey correspondences. 27.595128777777777 83.01683288888889 27.61289388888889 82.64585219444444 F00872 survey MBES and SSS overlaid onto Chart 11415 file:///T:/AHB_Archive/F00872/01_HDR/Reports/Descriptive_Report/SupportFiles/F00872%20survey%20MBES%20and%20SSS%20overlaid%20onto%20Chart%2011415.png This project is located in the approach to Tampa Bay, Florida and was part of an emergency survey in response to a United States Coast Guard request following Hurricane Ian. Conducting a hydrographic survey helps to ensure the channel is clear of any new or dangerous obstructions, and confirm the survey area is safe and navigable. The entire survey is adequate to supersede previous data. Data from this survey is intended to supersede all prior survey data in the common area. Data acquired in F00872 meet the requirements in the project instructions for a complete Set Line Spacing MBES survey without concurrent SSS, as outlined in HSSD section 5.2.2.4 Option A. Please reference S-J322-KR-22 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. A 4 m resolution CUBE surface was generated and analyzed in accordance with section 5.2.2.4 Option A of the HSSD. The finalized CUBE surface was analyzed using HydrOffice QC Tools Grid QA to assure data met the required uncertainty specifications. Uncertainty requirements were achieved for the finalized surfaces in F00872 with 100% percent of the surface nodes meeting the required NOAA Allowable Uncertainty specifications. Please reference the S-J322-KR-22 DAPR for more detailed information on uncertainty and processing methods. F00872 4m grid node uncertainty as a fraction of allowable IHO TVU (computed) file:///T:/AHB_Archive/F00872/01_HDR/Reports/Descriptive_Report/SupportFiles/F00872_MB_4m_MLLW_Final.QAv6.tvu_qc.png US4FL1PQ 40000 6 2022-10-26 2022-10-26 US4FL10M 80000 47 2022-10-13 2022-10-13 F00872_MB_4m_MLLW CARIS Raster Surface (CUBE) 4 13.095 26.835 NOAA_4m MBES Set Line Spacing F00872_MB_4m_MLLW_Final CARIS Raster Surface (CUBE) 4 13.095 26.835 NOAA_4m MBES Set Line Spacing F00872_SSSAB_1m_850kHz_1of1 SSS Mosaic 1 N/A 100% SSS The survey area for F00872 is centered primarily within the charted USACE Federal Channel to Tampa Bay. A comparison of the surveyed depths to the depth range value 1 attribute listed in the ENCs and the controlling channel depth was conducted. Daily XYZ bathymetric data from the survey was provided to the USACE to assist with assessing the overall condition of the channel as part of a daily required deliverable. Excessive shoaling/DTONs were identified and reported in the field in accordance with the PI. One uncharted obstruction was identified within the channel and was reported in accordance with the PI and included in the Final Feature File (FFF). It should be noted that the least depth and position for this obstruction may have changed slightly after the data were further post-processed. Please reference the DR Appendix II Supplemental Records for the specific correspondence regarding the obstruction. This ERS survey was transformed to the vertical datum for this project of Mean Lower Low Water, through the Ellipsoid to Chart Datum Separation File: "Tampa Bay Response VDatum_100m_NAD83-MLLW_geoid12b.csar". Real-time positional data were corrected with G2+ Global Navigation Satellite System (GNSS) satellite corrections provided by the Fugro Marinestar Satellite-Based Augmentation System (SBAS). To improve the accuracy of the real-time data, real-time position and attitude data were post-processed using Applanix POSPac Mobile Mapping Solution (MMS) software. Trimble CenterPoint RTX correction methods were used to create Smoothed Best Estimate of Trajectory (SBET) files, which were applied to the survey data in CARIS HIPS. The provided separation model was then utilized to bring the data from ellipsoid heights to chart MLLW datum. The horizontal datum for this survey was North American Datum of 1983 (NAD 83) (2011). The projection used was Universal Transverse Mercator (UTM) Zone 17N. Density The finalized CUBE surface was analyzed using HydrOffice QC Tools Grid QA tool to assure data density specifications. Density requirements were achieved for the finalized surface in F00872 with at least 95% of the surface nodes containing five or more soundings, exceeding the specifications required by section 5.2.2.4 of the HSSD. F00872 4 m surface data density statistics file:///T:/AHB_Archive/F00872/01_HDR/Reports/Descriptive_Report/SupportFiles/F00872_MB_4m_MLLW_Final.QAv6.density.png Flier finder results In addition to a visual inspection, the finalized 4 m CUBE surface was analyzed using HydrOffice QC Tools Flier Finder tool to assure data does not contain fliers (anomalous data as defined by QC Tools flier finding algorithms #2-6). While the Flier Finder tool flags surface fliers meeting a set criteria, it will also flag real surface features that meet the same criteria. Spurious soundings flagged by Flier Finder were cleaned until only the remaining flagged fliers were deemed valid aspects of the surface. Side Scan Sonar Contact File Unique ID During final survey review, a discrepancy was noted between the Contact Number within the CARIS SSS .HIPS file and the SSS contact file. For each object selected as a contact in the Side Scan Editor tool, the Contact Number and image name were different than the Unique Object ID and image name assigned to the the feature upon export of the SSS contact file. Every contact identified in the CARIS SSS .HIPS file was compared to the S-57 SSS contact file export results to confirm that the contact images, position, and contact height values were correct. For further information, please reference the S-J322-KR-22 DAPR. 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 Survey Summary 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, Standing and 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 Survey Summary Report. David J. Bernstein Chief of Party 2022-12-13 Data Acquisition and Processing Report 2022-12-13