OPR-G380-TJ-15Approaches to CharlestonSoutheast Atlantic OceanNOAA Ship THOMAS JEFFERSONH1280515Southeast of the Approaches to Charleston HarborSouth CarolinaUnited States200002015Shepard M. Smith, CAPT/NOAANavigable Area2015-04-092015-11-052015-11-16Multibeam Echo SounderSide Scan SonarmetersUniversal Transverse Mercator (UTM)UTCAtlantic Hydrographic BranchNOAAThis hydrographic survey was completed using the coverage requirements specified by hydrographic survey project instructions OPR-G380-TJ-15, signed 9 April 2015. This survey is located southeast of the approaches to Charleston harbor. 32.6191427579.823269083332.503265777879.5093511667The area surveyed as H12805 is based on time remaining, traffic, and NOAA Ship Whiting junctions. This survey was run in the southern area working west. Charted wrecks, obstructions, and a fish haven where also investigated as part of this survey. H12805 consists of the southern area with westward progression overlayed on RNC 11528file:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_Survey_progression.jpgH12805 in relation to the project area overlayed on RNC 11528file:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_Project_Area.jpgThis project is being conducted in support of NOAA's Office of Coast Survey to provide contemporary hydrographic data in support of a new nautical chart in this area and in response to a harbor deepening project in the Port of Charleston which will better serve deeper draft ships transiting the area. The entire survey is adequate to supersede previous data.All waters in the survey area. The hydrographer chose to use option A. Object detection: either A) 200% SSS with concurrent set line spacing SBES or MBES with backscatter, or B) object detection MBES with backscatter. Holidays are present in the 200% mosaic. Holidays are covered with multibeam or the other 100% percent of side scan sonar. Figures 3 and 4 show 200% side scan holidays that are covered with multibeam data and the other 100% coverage (magenta). H12805 200% mosaic holiday example 1file:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_Holiday_Example_1.jpgH12805 200% mosaic holiday example 2file:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_Holiday_Example_2.jpgS222000001105.01078.6303101024.140007.30003102037.18000000.140061.320001112.31078.7706.710000342015-11-052015-11-062015-11-072015-11-082015-11-092015-11-102015-11-112015-11-122015-11-132015-11-142015-11-152015-11-16Refer 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.S222208153101315.23102315.2Data were acquired by NOAA Ship Thomas Jefferson and Hydrographic Survey Launches 3101 and 3102. NOAA Ship Thomas Jefferson acquired Reson 7125 SV2 multibeam echosounder soundings, multibeam backscatter data, Klein 5000 V2 side scan sonar data, Rolls Royce MVP100 sound velocity profiles, and Applanix POS/MV version 5 position and attitude data. NOAA Launch 3101 acquired Reson 7125 SV2 multibeam echosounder soundings, multibeam backscatter data, Klein 5000 side scan sonar data, Seabird Seacat 19+ sound velocity profiles and Applanix POS/MV version 4 position and attitude data. NOAA Launch 3101 acquired Reson 7125 SV1 multibeam echosounder soundings, multibeam backscatter data, Seabird Seacat 19+ sound velocity profiles and Applanix POS/MV version 4 position and attitude data.ApplanixPOS/MV version 4Positioning and Attitude SystemApplanixPOS/MV version 5Positioning and Attitude SystemSeabirdSeacat 19+ Conductivity, Temperature, and Depth SensorRolls RoyceMVP 100Conductivity, Temperature, and Depth SensorReson 7215 SV1 MBESReson7125 SV2 MBESResonSV-71 Sound Speed SystemKlein 5000SSSKlein5000SSSCrosslines were compared to mainscheme by creating a difference surface in Caris BathyData Base. A 1m CUBE surface was created using strictly mainscheme lines, while a second 1m CUBE surface was created using only crosslines. The depth layers of the two surfaces were then differenced. The minimum difference value was -1.14m and and maximum difference value was 2.22m. The mean was 0.017m and the standard deviation was 0.133m. Survey H12805 complies with section 5.2.4.3 of the HSSD (2015 ed). The Chief Hydrographer chose to exceed the specifications of 4% crossline coverage for validation at closer intervals when given the option of interpolating ERS holidays versus re-acquiring bathymetry.H12805 The minimum value of -1.14m occurs on obstructionsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_XL_Diff_Minimum.jpgH12805 Subset of the obstructionsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_XL_Diff_Minimum_2.jpgH12805 The maximum value of 2.22m occurs on a charted wreckfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_XL_Diff_Maximum.jpgH12805 Subset of the charted wreckfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_XL_Diff_Maximum_2.jpgH12792 XL to MS depth difference surface statisticsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_MS_XL_stats.jpg00.125Discrete ZoningS222410.231014N/A0.231024N/A0.2Total Propagated Uncertainty values for survey H12805 were derived using a combination of: real time uncertainties for vessel motion; a priori values for equipment and vessel characteristics; assigned values for water level uncertainties; and field assigned values for sound speed uncertainties. The real time uncertainties for vessel motion include roll, pitch, gyro, navigation, and elevation. The uncertainties in these measurements were recorded as part of the POSPac post-processed Precise Point Position (5P) positional solution and were applied to the soundings via an SBET RMS file generated by Applanix POSPac. Uncertainties for sonar mounting and vessel speed were assigned using the a priori values found in Appendix 4, table 4.9 of the NOAA Field Procedures Manual (FPM) (ed 2014), and applied to the data via the CARIS HIPS Hydrographic Vessel File. Uncertainties associated with water level measurements and interpolation were automatically calculated as part of the TCARI water levels, and applied to the data during the Merge process. Finally, the uncertainty associated with sound speed measurements were based on the frequency and location of CTD casts, in accordance with the guidance set by Appendix 4 of the FPM (ed 2014). Total Propagated Uncertainties for the entire survey were evaluated to ensure compliance with section 5.1.3 of NOAA's HSSD (ed 2015). First, the maximum allowable uncertainty for each node was calculated using the equation: -Uncertainty/((0.5^2+((Depth*0.013)^2))^0.5). Second, the ratio between the actual uncertainty and maximum allowed uncertainty was found for each node. For the surface H12805_MB_50cm_MLLW_Final out of 20,915,421 nodes, 10,737 did not meet IHO order 1 standards (or 99.99% meet IHO order 1 uncertainty requirements). Those nodes that do not pass are on obstructions and other features. For the surface H12805_MB_1m_MLLW_Final out of 106,635,473 nodes, 30 did not meet IHO order 1 standards (or 99.99% meet IHO order 1 uncertainty requirements). The nodes that do not pass are located on outer beams. A custom layer was created for the finalized surface submitted in correlation with survey H12805. The layer was derived from the difference between the calculated uncertainties of individual nodes and the allowable uncertainty at the coupled node. This layer was examined using the CARIS QC report tool. The resulting statistical analysis identified 99.9% of nodes within H12805 met the vertical uncertainty standards of Section 5.1.3 of the 2015 Hydrographic Survey Specifications and Deliverables.Surface H12805_MB_50cm_MLLW_Final uncertainty standardsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_MB_50cm_MLLW_Final_TVU_QC.pngSurface H12805_MB_1m_MLLW_Final uncertainty standardsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_MB_1m_MLLW_Final_TVU_QC.pngThe survey was compared with three juctions acquired by NOAA Ship Thomas Jefferson during the 2015 field season. Depth comparisons were made using a CARIS HIPS generated difference surface as a check that the sonar systems and application of correctors were in agreement within 0.3m.H12805 Junctionsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_Junctions.jpgH12766200002015NOAA Ship THOMAS JEFFERSONNThe difference between survey H12805 and the junction survey H12766 ranged from -0.50m to 0.31m. The mean was -0.1m and the standard deviation was 0.1m. When differenced, 98.2% of sounding nodes agree within 0.3mH12805 and junction H12766 statisticsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_H12766_stats.jpgH12805 and junction H12766 orange areas range from -0.31m to -0.50m file:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_H12766_diff.jpgH12795200002015NOAA Ship THOMAS JEFFERSONEThe difference between survey H12805 and the junction survey H12795 ranged from -0.83m to 0.32m. The mean was -0.1m and the standard deviation was 0.1m. When differenced, 95.9% of sounding nodes agree within 0.3mH12805 and junction H12795 statisticsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_H12795_stats.jpgH12805 and junction H12795 red areas range from -0.31m to -0.83m file:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_H12795_diff.jpgH12769200002015NOAA Ship THOMAS JEFFERSONSEThe difference between survey H12805 and the junction survey H12769 ranged from -0.30m to 0.26m. The mean was -0.1m and the standard deviation was 0.1m. When differenced, 100% of sounding nodes agree within 0.3mH12805 and junction H12769 statisticsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_H12769_stats.jpgSonar system quality control checks were conducted as detailed in the quality control section of the DAPR.None ExistThere were no conditions or deficiencies that affected equipment operational effectiveness.None ExistThere were no other factors that affected corrections to soundings.Sound speed profiles were acquired from S222 in accordance with HSSD 2015 standards using a Rolls Royce Brooke Ocean MVP 100 approximately every hour with efforts made to evenly distribute the casts spatially and temporally across the survey area. All MVP casts were concatenated into a vessel master file and applied to multibeam data in CARIS using the parameter of nearest in distance within time 1 hour. Sound speed profiles were acquired from launches 3101 and 3102 in accordance with HSSD 2015 standards. The CTD casts were concatenated into vessel master files and applied to multibeam data in CARIS using the parameter of nearest in distance within time 4 hours. Caris returned the following error when applying SVP nearest in distance within time 1 hour "no SVP was found for the specified time stamp". The following ship lines were applied nearest in distance within time 2 hours 317_173_1315, 317_174_1252, 317_175_1224, and 317_172_1339. H12805 acquisition lines colored by the corresponding sound speed casts applied northfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_SVP_2.jpgH12805 acquisition lines colored by the corresponding sound speed casts applied southfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_SVP.jpgAll equipment and survey methods were used as detailed in the DAPR.H12805 Density complianceDensity requirements for H12805 were analyzed using the finalized CSAR QA tool in the Pydro Contributions program. The Chief Hydrographer chose to exceed the specifications for object detection with set line spacing because density requirements were met and bathymetry was better represented using a 1m resolution. The 1 meter surface meets density 99.7% of the time. The 0.5 meter grid meets density 95.4% of the time. H12805 0.5 meter finalized surface density resultsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_MB_50cm_MLLW_Final_Density.pngH12805 1 meter finalized surface density resultsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_MB_1m_MLLW_Final_Density.pngAll data reduction procedures conform to those detailed in the DAPR.The following calibrations were conducted after the initial system calibration discussed in the DAPR:GAMS2015-06-15New antennas were installed on S222Backscatter was logged as a 7k file and submitted to the Atlantic Hydrographic Branch for processing. One line per vessel, per day was processed aboard the Thomas Jefferson in order to assess and ensure quality. The only line acquired by S222 on DN313 line number 313_258_2336 failed to process backscatter. CarisHIPS/SIPS9.0.20CarisHIPS/SIPS9.0.20NOAA Profile V_5_3.3H12805_SSS_100_1mSSS Mosaic100N/A100% SSSH12805_SSS_200_1mSSS Mosaic100N/A200% SSSH12805_MB_50cm_MLLW_FinalCUBE0.56.9919.89NOAA_0.5mObject DetectionH12805_MB_1m_MLLW_FinalCUBE18.9822.31NOAA_1mMBES Trackline Set Line SpacingH12805_OD_1_MB_50cm_MLLW_FinalCUBE0.513.0919.89NOAA_0.5mObject DetectionH12805_OD_2_MB_50cm_MLLW_FinalCUBE0.58.9814.77NOAA_0.5mObject DetectionH12805_OD_3_MB_50cm_MLLW_FinalCUBE0.515.3716.62NOAA_0.5mObject DetectionH12805_OD_4_MB_50cm_MLLW_FinalCUBE0.515.5617.28NOAA_0.5mObject DetectionH12805_OD_5_MB_50cm_MLLW_FinalCUBE0.514.7415.78NOAA_0.5mObject DetectionH12805_OD_6_MB_50cm_MLLW_FinalCUBE0.515.4018.25NOAA_0.5mObject DetectionH12805_OD_7_MB_50cm_MLLW_FinalCUBE0.514.5817.88NOAA_0.5mObject DetectionH12805_OD_8_MB_50cm_MLLW_FinalCUBE0.510.8814.80NOAA_0.5mObject DetectionObject detection surfaces were created for features found and covered with multibeam in the set line spacing area. The object detection surfaces are labeled below. H12805 object detection surfaces layoutfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_OD_layout.jpgS222 Trueheave ProblemsOn DN312 the 111 box in the POS/MV controller was not checked for acquiring true heave. This is required for applying delayed heave in Caris. ON DN319 gaps of greater than the allowable 4 seconds were present. There was also a Caris crash when trying to apply the delayed heave. This affects all of the lines acquired in the morning (lines 319_271_0010 to 319_268_1133). None of these lines have delayed heave applied. There is a higher uncertainty on the lines that do not have delayed heave applied. There is also higher uncertainty in the obstruction areas.H12805 High uncertainty on lines without delayed heave (bright orange)file:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_Uncertainty.jpgMultibeam Data FiltersA swath filter was applied to the data to remove sonar side lobe anomalies in the RESON SV2 system. The filter used logic that rejected bathymetric data points beyond 60 degrees on either side of nadir. The filter was only applied to cross lines. All other erroneous data was manually rejected by the hydrographer during normal data processing and editing.H12805 Vertical OffsetsThere are vertical offsets present. These are caused by slight ERS issues. There appears to be a slight offset issue as well. These do not exceed 0.46 meters. Vertical offsets are present in the obstruction areas acquired by the ship. These do not exceed 0.50cm. H12805 vertical offsets examplefile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_vertical_offset.jpgH12805 obstruction area offsets examplefile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_vertical_offset_2.jpgH12805 HDCS DivisionThis survey is divided into four HDCS processing projects. There are two projects for the multibeam as well as two projects for the side scan. Due to the size of the project this was deemed necessary to allow multiple users to be able to process the data. Caris can open multiple hips files so the project can be treated as a whole. H12805 HDCS projectsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_HDCS_Procesing.jpgAdditional information discussing the vertical or horizontal control for this survey can be found in the accompanying HVCR.Mean Lower Low WaterVDatum2015_G380_VDatum_NAD83_MLLW_rev2.csarAll soundings submitted as H12805 are reduced to MLLW using documented VDatum techniques. If it is deemed necessary to change the water level reduction method to discrete zoning the following additional information will be useful: 1) The National Water Level Observation Network (NWLON) stations serving as datum control for this survey is Charleston, SC (8665530). 2) The submitted water level files (8665530_Verified.tid) are the final approved water levels for the period of hydrography. These files have been loaded to all CARIS lines submitted as H12805. 3) The submitted tide corrector (G380TJ2015CORP.zdf) is the preliminary zoning file that was accepted as final per final tide note, submitted in Appendix I. This file has been loaded to all CARIS lines submitted as H12805. 4) A request for final approved tides was sent to COOPS on 17 November, 2015. The final tide note was received on 1 December 2015, stating that preliminary zoning is accepted as the final zoning for project OPR-G380-TJ-15, H12805, during the time period between 5 November 2015 and 16 November 2015. North American Datum of 1983 (NAD83)The projection used for this project is UTM zone 17 north. Additional information disucssing the use of 5P for this survey can be found in the accommapnying DAPR.Chart comparison procedures were followed as outlined in section 4.5 of the FPM (2014 ed) and section 8.1.4 sub section D.1 of the HSSD (2015 ed). The ENC and RNC versions of the relevant charts were reviewed to ensure that the latest USCG Local Notice to Mariners (LNM) has been applied. Chart comparisons for survey H12805 were conducted using a selected sounding set over plot removed to a map scale of 1:30000. In CARIS BDB, the soundings were then converted into a point cloud, from which a 1m interpolated surface was generated. Contouring was run on the interpolated surface and the results are listed below.11528125740000112004-052014-01-182014-01-07Most of the soundings agree within two feet. The largest area of change is near a charted depth of 51 feet. There is a charted 51 foot wire drag that is no longer relevant. These images are shown below. There is some shifting of the contours. Some charted soundings were not surveyed due to the set line spacing of the survey. The Hydrographer recommends updating all contours and soundings with the digital data from survey H12805.H12805 Soundings vs charted soundingsfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_Soundings.jpgH12805 charted 51 foot wire dragfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_51_wire_drag.jpgH12805 Contours layoutfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_Contours.jpgH12805 Contours main areafile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_Contours_2.jpgH12805 Contours westfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_Contours_3.jpgH12805 Contours northfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_Contours_4.jpgUS5SC25M4000012015-11-19falseIn general, survey H12805 is in agreement with ENC US5SC25M. Most of the soundings agree within 0.6meters. The largest area of change occurs on the east side. There are depths up to 0.9 meters deeper than charted.Shoal sounding differences observed between the ENC and H12805 are shown. Depth ranges are in meters.file:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_ENC_Shallow.jpgH12805 ENC shoal sounding difference main areafile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_ENC_Shallow_2.jpgH12805 ENC shoal sounding difference westfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_ENC_Shallow_3.jpgH12805 ENC shoal sounding difference northfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_ENC_Shallow_4.jpgDeep sounding differences observed between the ENC and H12805 are shown. Depth ranges are in meters.file:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_ENC_Deep.jpgH12805 ENC deep sounding difference main areafile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_ENC_Deep_2.jpgH12805 ENC deep sounding difference westfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_ENC_Deep_3.jpgH12805 ENC deep sounding difference westfile:///H:/Surveys/OPR-G380-TJ-15/H12805/Separates/Descriptive_Report/Report/DR_images/H12805_ENC_Deep_4.jpgNo Maritime Boundary Points were assigned for this survey.Eleven charted items were investigated in the survey area. Consult the H12805_FFF.hob file for more information about the charted features in the survey area.Seven uncharted features were found. Consult the H12805_FFF.hob file for more information about the uncharted features in the survey area.2Danger to Navigation Reports are included in Appendix II of this report.No shoals or potentially hazardous features exist for this survey.No channels exist for this survey. There are no designated anchorages, precautionary areas, safety fairways, traffic separation schemes, pilot boarding areas, or channel and range lines within the survey limits.No bottom samples were required for this survey.Shoreline was not assigned in the Hydrographic Survey Project Instructions or Statement of Work.Comparisons were made only to the chart.One ATON R "8" was investigated and is on station serving its intended purpose as mentioned in the acquisition log. No overhead features exist for this survey.No submarine features exist for this survey.No ferry routes or terminals exist for this survey.No platforms exist for this survey.No Significant Features 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 insets 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 and Specifications Deliverables Manual, 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.CAPT Shepard M. Smith, NOAACommanding Officer2016-02-09LT Joseph K. Carrier III, NOAAField Operations Officer2016-02-09HST Kimberly GlombSheet Manager2016-02-09