S-G907-NRTFB-25 Blount Island Florida F00916 Blount Island -0400 2025-03-06 2025-03-06 DOC/NOAA/NOS/OCS -- Office of Coast Survey James Kirkpatrick NOAA NRT-Fernandina 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). SupportFiles\Overview.jpg SupportFiles\Survey_Area.jpg F00916_MB_1m_MLLW_1of1 Projected UTM 17 North American Datum 1983 (2011) meters Mean Lower Low Water meters found by multi beam Yes Yes 2.0m (General 1) 10% (General 1) Yes No No 5m (General 1) 5% (General 1) 0.25m (Critical) 0.75% (Exceptional/Critical) S3009 NRTFB Positioning and Attitude System Applanix POS MV 320 v5 IMU-89 2436 2025-03-05 Positioning and Attitude System Applanix POS MV 320 v5 TPU 5805 2025-03-05 Multibeam Kongsberg Maritime EM 2040C Transducer 1433 300kHz 2025-03-05 2025-03-05 Multibeam Kongsberg Maritime EM 2040C EM HWS 2111 NA 2025-03-05 2025-03-05 Side-scan sonar EdgeTech 4125 Towfish 40425 400-900kHz 2025-03-05 2025-03-05 Side-scan sonar EdgeTech 4125 TPU 40256 NA 2025-03-05 2025-03-05 Conductivity, Temperature, and Depth Sensor SonTek CastAway-CTD Castaway CC1433010 NA 2025-03-05 2025-03-05 Sound Speed System AML Oceanographic MicroX SV MicroX 203523 NA 2025-03-05 2025-03-05 Crosslines totaled 20% of the mainscheme for F00916. A Caris Hips and Sips difference surface compared 7,338 soundings with a mean difference of 0.0m and standard deviation of 0.0m. F00916 Crossline Statistics SupportFiles\Compute_Statistics.jpg Junction analysis was not performed for this survey NRTFB uses the CARIS CUBE BASE surface algorithms for the generation of all surfaces generated for final submission. The exact behavior of CUBE is determined by the values set in the CUBE parameters file, a xml file which can be selected by the user in the CARIS Tools --> Options --> Environment tab. The NOAA Office of Coast Survey (OCS) has created and provided a customized CUBE parameters file (CubeParams_NOAA.xml) with new CUBE parameters that are required for each grid resolution. During the creation of CUBE surfaces, the user is given the option to select parameter configurations based upon surface resolution which have been tuned to optimize the performance of the CUBE algorithm. The advanced options configuration is manipulated based on the grid resolution of the CUBE surface being generated. Charlene now creates the "working surfaces", which are then reviewed and finalized manually. QCTools 4 is used to further analyze submitted bathymetric surfaces by using FlierFinder to identify potentially erroneous soundings, Holiday Finder to locate gaps in coverage, and Grid QA to determine sounding density and TVU. The CUBE surface child layers: uncertainty, standard deviation, and node standard deviation were primarily used to help focus directed editing to soundings that were negatively affecting the BASE surface. Another method to check the quality of sounding data prior to submission is the Pydro QC Tools “Flier Finder”. This software scans the CUBE surface for potential anomalous grid data. Lowering the flier height value will increase the sensitivity of the flier finder, resulting in more nodes being flagged. Fliers are then exported as .000 S-57 files that can be imported into CARIS HIPS and SIPS to aid in further cleaning. If desired, the user can set a new tolerance (“Flier height”) and rerun Flier finder. On occasion, the resolution of the CUBE surface may not be sufficient to capture the high point of a feature. In less than 20m of water, any feature where the most probable accurate sounding is shoaler than the CUBE surface by greater than one half the allowable error OCS Quality Metrics for Uncertainty is considered inadequately captured by the CUBE surface. In greater than 20m of water, this allowable error is expanded to the full OCS QualityMetric error allowance at that depth. Although missed shoal points may occur on irregular shoals or rock pinnacles, man-made features such as piles and wrecks are of particular concern. These features have very slender high points that extend far above the surrounding seafloor as well as the CUBE surface. To ensure that these features are properly represented, the shoalest point is flagged “designated” in CARIS. During the “finalization” process, the CUBE surface is forced to honor all soundings which have been flagged “designated”. In the case of a survey where the high points of many features (i.e. a boulder field) are not being captured by the CUBE surface, the hydrographer may decide to produce higher resolution CUBE surfaces to ensure that these features are being honored. Sudden change in depth resulting in fliers. SupportFiles\Flier_Subset.jpg Noisy margin fliers caused by the sudden change in depth. SupportFiles\FlierFinder_1.jpg Holiday identification was not performed for this survey F00916 is adequate to supersede all previous survey data. All side scan sonar imagery is converted from JSF or HSX formats to CARIS format using Charlene. After conversion the data is opened in CARIS Navigation Editor, Attitude Editor, and Side Scan Editor. Survey personnel then check vessel attitude, cable out, gyro, and sonar height.Side scan sonar data is examined in CARIS Side Scan Editor. Survey personnel correct errors in bottom tracking, slant range correction is done automatically in Caris. Data is examined for significant contacts. A 1m mosaic is created for evaluation of coverage gaps for 100% and 200% coverages. A single 2 meter Acoustic Backscatter mosaic was created to visualize imagery coverage for F00916. Data interpolation was not performed for this survey N/A The Kongsberg 2040C settings were adjusted during F00916. Configuration did not result in saturation. No environmental variables influenced backscatter measurements. Backscatter was post-processed in FMGT. 2025-0-00 Total Propagated Uncertainty (TPU) values were derived from a combination of fixed values for equipment and vessel characteristics, as well as field assigned values for sound speed uncertainties. The uncertainty for the VDatum model was provided to the field units. In addition to the usual a priori estimates of uncertainty, some real time and post processed uncertainty sources were also incorporated into the depth estimates of the survey. Real-time uncertainties from the Kongsberg MBES sonars were incorporated and applied during post processing. Uncertainties associated with vessel roll, pitch, gyro, navigation, and heave were applied during post-processing. All of the aforementioned uncertainties were applied in CARIS. This is an ellipsoidally referenced survey (ERS) and the tidal component was accomplished with a separation model. There are two places in CARIS where the user directly defines uncertainty values for use in CARIS to calculate TPU values, in the HVF and the direct input of SV and GPS model values during the TPU computation. TPU values for all motion, navigation position and timing values are taken directly from Appendix IV (Uncertainty values for use in CARIS with vessels equipped WITH an attitude sensor) of the FPM. All timing values were set to 0.001 seconds as outlined for setups with Ethernet connections and precise timing. All offset values were chosen to be 0.02 meters based on the accuracy provided by professional surveys. All MRU alignment values are derived from the patch test. The gyro value is taken directly from the standard deviation of the yaw values. The pitch/roll value is combined as one in the HVF. Coast Pilot Report 2025-03-27 NCEI Sound Speed Data 2025-03-31 Trained Marine Mammal Observers list 2024-08-29 Final Survey Outline 2025-03-31 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 and approved all data and metadata. The survey meets or exceeds requirements as set forth in the Project Instructions and NOS Hydrographic Surveys Specifications and Deliverables. The survey is complete and no additional work is required with the exception of any deficiencies noted in the Report of Survey. James L. Kirkpatrick Chief of Party Howard Meyers Survey Technician