Natural Disaster Response Support USCG 2024 F00912 Florida Tampa Bay Tampa Bay Approach Channel 10000 2024-10-11 2024-10-15 2024-10-09 S-J950-KR-24 eTrac David Neff MBES R2Sonic 2024 MBES Backscatter R2Sonic 2024 Atlantic Hydrographic Branch meters All times are UTC. The purpose of this survey is emergency response to a USACE and USCG request for survey in the approaches to Tampa Bay, FL following Hurricane Milton. F00912 covers approximately 3.74 square nautical miles of the approaches to Tampa Bay, FL. 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 (2011) Mean Lower Low Water VDatum Projected UTM 17 2024-12-16 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). This hydrographic survey was acquired in accordance with the requirements defined in the Project Instructions S-J950-KR-24. 27.623222944444446 83.02174669444445 27.584838166666664 82.65170027777778 Survey Coverage file:///B:/S-J950-KR-24/Surveys/F00912/01_HDR/Reports/Descriptive_Report/SupportFiles/SurveyCoverageF00912.png S-J950-KR-24 was an emergency survey in response to a US Army Corps of Engineers (USACE) and US Coast Guard (USCG) request for survey in the Approaches to Tampa Bay, FL following Hurricane Milton. R/V Thunder was able to quickly respond and arrived on site within 48 hours after landfall. Based upon our arrival time, the survey area was extended from the Seaward Buoy past Egmont Channel Lighted Buoy 16, to the Sunshine Skyway Bridge at the entrance to the Port of Tampa Bay. Both the vessel-based team and the office-based team worked around the clock to collect and process data of the center line of the channel, continuing on to the full length of the inbound side of the channel to ensure safe clearance for the numerous vessels waiting to come in and out of the Port of Tampa Bay. Once the inbound side of the channel was clear, R/V Thunder completed the survey of the outbound side of the channel and completed fill and investigations. The Port of Tampa Bay was able to open the inbound side of the channel within 24 hours of our arrival onsite. This project highlighted the collaborative effort between USACE, USGC, NOAA, and contractors and our shared value placed on natural disaster response. 12-hour and daily updates were provided to the USCG, the USACE, and NOAA keeping all parties up to date on our collection and processing progress. eTrac's custom web-based GIS tracking site was also utilized by each party to view near realtime updates of our vessel location and coverage. The entire survey is adequate to supersede previous data. This survey is recommended for charting. Please reference Data Acquisition and Processing Report <S-J950-KR-24_DAPR> for a complete description of data acquisition and processing systems, survey vessels, quality control procedures and data processing methods. The following survey specific parameters were used for this survey: Tide TPU Value - ERS Via VDATUM - Measured 0.11 meters Sound Speed TPU Values - Deployed Sound Speed Profiler 0.05 meters/second - Surface Sound Speed Profiler 0.2 meters/second. The standard deviation uncertainty and the total vertical uncertainty (TVU) layers of the Dynamic Surface were utilized during data processing to search for features and systematic errors. IHO Order 1a uncertainty specification was met by 100% of the nodes. Using Qimera each dynamic surface was exported to a Bathymetric Attributed Grid (BAG) with TVU represented in the uncertainty layer. Using this BAG, the percentage of nodes that fell within the TVU specification for each Dynamic Surface was calculated using the NOAA QC Tools program. There results are shown in the images below. Object Detection Option A MBES (Finalized 50cm and 1m CUBE weighted Dynamic Surfaces in NOAA QC Tools) = 100% of nodes are within the allowable TVU. Note: A limitation in the Qimera software did not allow for the sheetwide 50cm CUBE surface to be exported to a BAG file using TPU as the uncertainty layer. In order to export to a BAG with TVU represented in the uncertainty layers, the survey area was divided into three sections. F00912 Finalized 50cm MBES 1of3 TVU Statistics file:///B:/S-J950-KR-24/Surveys/F00912/01_HDR/Reports/Descriptive_Report/SupportFiles/F00912_MB_50cm_MLLW_Final_1of3.GQv6.tvu_qc.png F00912 Finalized 50cm MBES 2of3 TVU Statistics file:///B:/S-J950-KR-24/Surveys/F00912/01_HDR/Reports/Descriptive_Report/SupportFiles/F00912_MB_50cm_MLLW_Final_2of3.GQv6.tvu_qc.png F00912 Finalized 50cm MBES 3of3 TVU Statistics file:///B:/S-J950-KR-24/Surveys/F00912/01_HDR/Reports/Descriptive_Report/SupportFiles/F00912_MB_50cm_MLLW_Final_3of3.GQv6.tvu_qc.png F00912 Finalized 1m MBES TVU Statistics file:///B:/S-J950-KR-24/Surveys/F00912/01_HDR/Reports/Descriptive_Report/SupportFiles/F00912_MB_1m_MLLW_Final.GQv6.tvu_qc.png Junctioning surveys were not assigned for this project. However, survey data from the USACE September 2024 channel maintenance surveys were downloaded from the USACE eHydro Site and compared against our data. Cross-sections between the datasets were analyzed in Qimera and difference statistics were exported. F00912 - USACE September 2024 Difference Statistics file:///B:/S-J950-KR-24/Surveys/F00912/01_HDR/Reports/Descriptive_Report/SupportFiles/F00912_USACE_DiffTrac.png US5TPADC 22000 2 2024-02-02 2024-02-02 US5TPADD 22000 3 2024-10-02 2024-10-02 US5TPADE 22000 3 2024-10-02 2024-10-02 US5TPADF 20000 2 2024-11-20 2024-11-20 US5TPACC 22000 3 2024-11-20 2024-11-20 US5TPACB 22000 3 2024-11-20 2024-11-20 F00912_MB_50cm_MLLW_Final_1of3 BAG 0.5 12.35 18.39 NOAA_0.5m Object Detection F00912_MB_50cm_MLLW_Final_2of3 BAG 0.5 6.63 20.0 NOAA_0.5m Object Detection F00912_MB_50cm_MLLW_Final_3of3 BAG 0.5 7.29 20.0 NOAA_0.5m Object Detection F00912_MB_1m_MLLW_Final BAG 1 18.0 27.83 NOAA_1m Object Detection F00912_MB_50cm_MLLW_Parent_1of3 BAG 0.5 12.35 18.39 NOAA_0.5m Object Detection F00912_MB_50cm_MLLW_Parent_2of3 BAG 0.5 6.63 22.97 NOAA_0.5m Object Detection F00912_MB_50cm_MLLW_Parent_3of3 BAG 0.5 7.29 29.09 NOAA_0.5m Object Detection F00912_MB_1m_MLLW_Parent BAG 1 6.64 27.83 NOAA_1m Object Detection Note: A limitation in the Qimera software did not allow for the sheet-wide 50cm CUBE surface to be exported to a BAG file using TPU as the uncertainty layer. In order to export to a BAG with TVU represented in the uncertainty layers, the survey area was divided into three sections. The first section (1of3) is from Buoy T to Buoy 8. The second section (2of3) is from Buoy 7 to Buoy 16. The third section (3of3) is from Buoy 16 to the Skyway Bridge. Three 50cm finalized surfaces and one 1m finalized surface are provided for F00912 with depth range thresholds. Parent surfaces of each of the three 50cm surfaces and the 1m surface have also been provided. The 50cm surfaces do not meet object detection specifications for holidays and density. The 1m finalized surface and 1m sheetwide parent surface meet specifications for holidays and density. There are object detection parameter holidays (1x3 nodes) found in the 50cm CUBE surfaces. These holidays were caused by noisy soundings being removed from our starboard sonar of our mainscheme coverage. None of the holidays are larger than 3x3 nodes, meeting complete coverage specifications for holidays. We are still confident in our ability to detect features in our survey areas despite these 1x3 node holidays. The rejected noisy soundings also caused the 50cm surface soundings density to fall below 95%. For F00912_MB_50cm_MLLW_Final_1of3 92.07% of nodes had 5 or more soundings. For F00912_MB_50cm_MLLW_Final_2of3 89.97% of nodes had 5 or more soundings. For F00912_MB_50cm_MLLW_Final_3of3 88.54% of nodes had 5 or more soundings. The 1m sheetwide parent surface had 99.75% of nodes with 5 of more soundings. A chart comparison was conducted for F00912 using Pydro CA tools, Qimera, and Caris HIPS and SIPS. Survey data were compared against the largest scale ENCs to identify depth discrepancies. Using the 1 meter CUBE weighted dynamic surface, soundings were generated in the "Sounding Selection" tab of Pydro CA tools. Soundings were displayed against the charted soundings and a visual comparison was made in Caris HIPS and SIPS. Additionally, potential dangers and discrepancies were generated using the "DTM vs Chart" tab of Pydro CA Tools. The results were displayed through CA tools and investigated in CARIS HIPS and SIPS and Qimera. There were 29 charted features assigned to F00912. Per Investigation Requirements 3 of the assigned features were included in the Final Feature File (FFF). 3 unassigned charted features were also added to the FFF. Each feature in the FFF has been given a unique identifier in the "userid" field of the .000 S-57 file. (format 1XXX). Refer to the FFF for determinations and recommendations of each feature. There was 1 DtoN found in F00912, and added to the FFF and given an unique identifier. The DtoN was submitted to in the following Danger to Navigation Report: F00912_DtoN_01 1 other new feature was found in F00912, and was added to the FFF and given an unique identifier. There were 26 Dredge Areas Assigned to F00912. 1 Dredge Area - Egmont Key Cut 1 East ROQ was found to be 1m shoaler than charted. No other discrepancies were found. Per Investigation Requirements Dredge Areas were not included in the FFF. F00912 Finalized 50cm CUBE Weighted Dynamic Surface 1of3 file:///B:/S-J950-KR-24/Surveys/F00912/01_HDR/Reports/Descriptive_Report/SupportFiles/F00912_50cm_SurfaceCoverage_1of3.png F00912 Finalized 50cm CUBE Weighted Dynamic Surface 2of3 file:///B:/S-J950-KR-24/Surveys/F00912/01_HDR/Reports/Descriptive_Report/SupportFiles/F00912_50cm_SurfaceCoverage_2of3.png F00912 Finalized 50cm CUBE Weighted Dynamic Surface 3of3 file:///B:/S-J950-KR-24/Surveys/F00912/01_HDR/Reports/Descriptive_Report/SupportFiles/F00912_50cm_SurfaceCoverage_3of3.png F00912 Finalized 1m CUBE Weighted Dynamic Surface file:///B:/S-J950-KR-24/Surveys/F00912/01_HDR/Reports/Descriptive_Report/SupportFiles/F00912_1m_SurfaceCoverage.png Additional information discussing the vertical control for this survey can be found in the accompanying HVCR and DAPR. Additional information discussing the horizontal control for this survey can be found in the accompanying HVCR and DAPR. An additional assigned task for this project was to provide daily 3ft by 3ft gridded processed XYZ bathymetric files projected in NAD83 State Plane Florida West, US Survey Feet referenced to MLLW. To accomplish this task, data was re-projected and exported using Global Mapper. Noisy Sonar Data Causing Object Detection Holidays in 50cm resolution surfaces and lower sounding density. As mentioned previously in section F, there are 1x3 nodes object detection specification holidays in our surfaces caused by noisy soundings being removed from our starboard sonar of our mainscheme coverage during our thorough cleaning reviews once the vessel had left field. None of the holidays are larger than 3x3 nodes, meeting complete coverage specifications for holidays. We are still confident in our ability to detect features in our survey areas despite these 1x3 nodes holidays. During our initial review of the mainscheme data, any soundings questionable as a possible feature were marked and an investigation plan was made, areas of poor overlap between swath coverages were also marked and a fill plan was made. Our fill and investigation plan was acquired using only the port sonar which provided cleaner data. The removal of noisy soundings also effected our sounding density, resulting in density percentages under the 95% requirement on the 50cm resolution surfaces. The sheetwide 50cm parent surface sounding density requirement of 5 soundings per node was met by 90.46% of the nodes. Using the grid statistics tool in Qimera, it was determined that 94.98% of the nodes in the sheetwide 50cm surface contained at least 4 soundings per node and 97.46% of the nodes in the sheetwide 50cm surface contained at least 3 soundings per node. The 1m sheetwide parent surface sounding density requirement of 5 soundings per node was met by 99.75% of the nodes. Meeting complete coverage specifications. Motion Artifact A motion artifact is visible in the coverage of F00912. Vessel and equipment offsets were confirmed and there were no other correctors to apply. Although the motion artifact is visible, all of the data is within allowable TPU. F00912 Motion Artifact file:///B:/S-J950-KR-24/Surveys/F00912/01_HDR/Reports/Descriptive_Report/SupportFiles/F00912_Motion_Artifact.png 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 requirements as set forth in the NOS Hydrographic Surveys Specifications and Deliverables, Field Procedures Manual, Standing and Letter Instructions, and all HSD Technical Directives, except as noted in this report. 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 Neff, CH Chief of Party 2024-12-16