OPR-E349-BH2-12Central Chesapeake BayChesapeake BayNOAA R/V BAY HYDRO IIH1236725 NM East by Southeast of Cedar Pt.MarylandUnited States100002013LTJG Daniel Smith, NOAANavigable Area2012-06-132011-06-152012-12-19Multibeam Echo SounderSinglebeam Echo Sounder Side Scan SonarmetersUniversal Transverse Mercator (UTM)UTCPacific Hydrographic BranchThe purpose of this survey is to provide contemporary surveys to update National Ocean Service (NOS) nautical charts. All separates are filed with the hydrographic data. Notes in red were generated during office processing. The processing branch concurs with all information and recommendations in the DR unless otherwise noted. Page numbering may be interrupted or non-sequential. All pertinent records for this survey, including the Descriptive Report, are archived at the National Geophysical Data Center (NGDC) and can be retrieved via http://www.ngdc.noaa.gov/.NOAAThe survey area is located in Central Chesapeake Bay within the sub-locality of 5NM East by Southeast of Cedar Pt. 38.302238888976.220272222238.188913888976.2851861111The purpose of this survey is to supersede all bathymetry, seafloor features, and bottom characteristics within the assigned survey area for updating of National Ocean Service (NOS) nautical charts 12230, 12233, 12261, and 12264. This survey will cover approximately 11 SNM of critical survey area as designated in NOAA Hydrographic Survey Priorities (NHSP). The entire survey is adequate to supersede previous data.Survey Limits were acquired in accordance with the requirements in the Project Instructions and the HSSD.1H12367 Survey Outlinefile:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Survey_Outline.PNGSurvey Coverage was in accordance with the requirements in the Project Instructions and the HSSD.2011-06-152012-06-282012-08-062012-08-142012-08-152012-08-202012-08-212012-08-222012-08-232012-08-272012-08-292012-08-302012-09-062012-09-112012-09-122012-09-132012-10-242012-11-152012-12-19300008.093S54013.62.48012.8600353.9738.6703.62.48012.8600353.9738.67010.74On 15 June 2011, the three bottom samples were acquired for sheet H12367. The bottom samples were acquired so far in advance because sheet H12367 was originally part of sheet H12304 and all bottom samples were acquired at the same time. Later, sheet H12304 was split and sheet H12367 was created with the three bottom samples already having been acquired.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.S540117.31.8The R/V Bay Hydro II collected all Multibeam data, Side Scan Sonar data, Single Beam data, Sound Velocity data, and Attitude data for Survey H12367.ODOMEchotrac CV-200SBESRESONSeaBat 7125MBESKlein5000 LightweightSSSApplanixPOS M/V V4Positioning and Attitude SystemSea-Bird19+Sound Speed SystemODOMDigi-Bar ProSound Speed SystemVessel configurations, equipment operations and data acquisition and processing were consistent with specifications described in the DAPR.Crosslines were collected, processed and compared in accordance with section 5.2.4.3 of the HSSD. The R/V Bay Hydro II collected 38.67 linear nautical miles of SBES crosslines, equating to 10.74% of main scheme data. Surface differencing in CARIS Bathy DataBASE was used to assess crossline agreement with main scheme lines. A difference surface between a 4-meter uncertainty surface made with main scheme lines only and a 4-meter uncertainty surface made with crosslines only was produced. This difference surface is submitted digitally in the Separates II folder. The two surfaces agree within plus or minus 0.14 meters in 95% of all nodes and the maximum difference between any two nodes is 1 meter. 2Statistical representation of differences between crossline and mainscheme surfaces. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_4m_XL_Difference.pngS54014.0N/A0.5Survey H12367 used a Tidal Constituent and Residual Interpolation (TCARI) grid to apply tidal correctors. TCARI automatically calculates the error associated with water level interpolation, which is then included in the Total Propagated Uncertainty for the survey. For this reason, no Tidal Uncertainty values were entered into CARIS. No junction surveys were provided in the Project Instructions for OPR-E349-BH2-12, however sheet H12304 bounds to the west of this survey. The junction agreement is generally within the total allowable vertical uncertainty in their common areas and depths for all surfaces. Data overlap between the two surveys was achieved; see figure 3 for areas of overlap. H12304100002012NOAA R/V BAY HYDRO IIWSurface differencing in CARIS HIPS and SIPS was used to assess junction agreement between H12367_4m_combined and H12304_4m_combined surface. Agreement between the two surfaces was generally close, see figure 4 for statistical information. Differences of greater than one meter between the surfaces is attributed to the high change in slope in those areas. 3Junctions between H12367 and H12304.file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_H12304_Junction_Overlap.PNG4Statistical representation of differences for the junction between H12367 and H12304. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_H12304_4m_difference.pngSonar system quality control checks were conducted as detailed in the quality control section of the DAPR. In addition to this, the MBES and VBES data acquired on sheet H12367 were compared to each other to verify they fall within IHO Order 1 TVU specifications. The statistical analysis of the comparison is shown below in Figure 5. 5Statistical analysis of comparison between VBES and MBES data acquired on sheet H12367.file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_VBES_MBES_difference.pngNone ExistThere were no conditions or deficiencies that affected equipment operational effectiveness.None ExistThere were no other factors that affected corrections to soundings.Surface sound speed was collected in real time and integrated into the RESON 7125 bathymetric data.Sound Velocity Profile casts were generally acquired at approximately four hour intervals when acquiring multibeam data and weekly for vertical beam data. Sound speed values were then applied to data in CARIS HIPS. For both multibeam and vertical beam data, the Nearest in Time option was used. Distribution of sound velocity casts is shown in Figure 6.6H12367 SVP cast distributionfile:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_SV_Cast_Locations.PNGThe Bay Hydro II does not have an operational cable counter. Thus, the crew of the Bay Hydro II marked the SSS cable with tape to accurately identify the cable out measurement and input that into the acquisition software in real time. When the cable was originally marked, it was only marked up to 30 meters of cable out. This was sufficient for the majority of the acquisition of sheet H12367, except in water deeper than approximately 100 ft. In these areas, with the cable out being limited to 30 meters, the altitude sometimes was greater than 20% of the range scale and therefore did not meet specification for object detection. This was limited to the extreme southwest corner of the sheet H12367. In developing the survey for compilation, the reviewer was advised to reject the depth soundings beyond 30m. The area deeper than 30m was insignificant and had already been compiled in its entirety by the contemporary survey to the west, H12304. Taken together, H12367 and H12304 adequately cover all areas assigned for charting updates, and allows this survey to have a complete object detection coverage.IHO Uncertainty The data meet the accuracy specifications as stated in the NOS Hydrographic Surveys Specifications and Deliverables (HSSD) dated April 2012, see Standards Compliance Review in Appendix V. The areas of high uncertainty are all located along the western edge of sheet H12367 where there is a steep downslope which increases uncertainty of soundings. DensityDensity requirements were met for the 1m MBES finalized surface and the 4m VBES finalized surface with at least 96.59% of finalized surface nodes containing five or more soundings. Density requirements were not met for the 50cm MBES finalized surface. Only 84.01% of finalized surface nodes contained five or more soundings. This is due to the fact that the only MBES collected on sheet H12367 was for developments. Many of the nodes were only populated with outer beams from the MBES and therefore were low in density. All nodes containing the least depth of a feature had five or more soundings. See Standards Compliance Review, Appendix V. Holiday AssessmentSet spaced VBES was acquired with concurrent SSS for the entire survey area. Both 100% SSS mosaic and 200% SSS mosaic had holidays that are attributed to fish weirs in the survey area (Fig 7). Neither SSS mosaic reached the eastern sheet limit boundary continuously due to the fact that the NALL (Navigable Area Limit Line) was established to be westward of the sheet limit boundary in those areas (Fig 8). Numerous small holidays were noted each SSS mosaic. Most occurred along sheet limit edges where SSS lines were acquired at an angle to the sheet limit and were not extended far enough to prevent holidays. A table was created noting the positions of all other holidays located in the interior of each mosaic and is included in Appendix V. Some holidays were also present at the western sheet limit. After comparing with the mosaics from sheet H12304, which junctions with sheet H12367 to the west, it was found that there is adequate overlap along the western sheet limit. 7Holidays present in the SSS mosaics because of fish weirs in the survey area. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Holiday_Fish_Weir.PNG8Holidays present in the SSS mosaics as the NALL was westward of the eastern sheet limit boundary.file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_NALL_Line.PNGAll data reduction procedures conform to those detailed in the DAPR.A patch test was conducted during the acquisition of sheet H12367. Patch Test 2012-10-24It was discovered that offsets from the reference point to the IMU were recorded in both the POS-MV and the HIPS Vessel File. These offsets were removed from the HVF, so a new patch test was performed and was used in all subsequent acquisition days. Patch Test2012-10-24It was discovered that offsets from the reference point to the IMU were recorded in both the POS-MV and the HIPS Vessel File. These offsets were removed from the HVF, so a new patch test was performed and was used in all subsequent acquisition days. Backscatter was logged as 7k files and submitted directly to NGDC, and is not included with the data submitted to the Branch.The survey area does not contain sufficient MBES coverage to create a backscatter mosaic. In a follow-up correspondence, the field indicated that there was no backscatter submitted to NGDC for this survey.The email can be found in the DR Appendix II - The email is appended to this report.NOAA Extended Attribute Files V5.2There were no software configuration changes after the DAPR was submitted.H12367_1m_SSS_100SSS Mosaic1N/A100% SSSH12367_1m_SSS_200SSS Mosaic1N/A200% SSSH12367_4m_VBESBASE Uncertainty4N/AMBES TracklineSBES Set Line SpacingH12367_4m_VBES_FinalBASE Uncertainty4N/AMBES TracklineSBES Set Line SpacingH12367_50cm_MBESCUBE50NOAA_0.5mObject DetectionH12367_50cm_MBES_Final_0to20CUBE50020NOAA_0.5mObject DetectionH12367_1m_MBESCUBE1NOAA_1mObject DetectionH12367_1m_MBES_Final_19to40CUBE11940NOAA_1mObject DetectionThe surfaces have been reviewed where noisy data, or 'fliers' are incorporated into the gridded solution causing the surface to be shoaler than the true seafloor. Where these spurious soundings cause the gridded surface to be shoaler than the reliably measured seabed by greater than the maximum allowable vertical uncertainty at that depth, the noisy data have been rejected and the surface recomputed. A four meter resolution Uncertainty surface was created all set line spacing VBES data regardless of depth, in accordance with HSSD April 2012 section 5.2.2.3. The VBES surface was finalized to calculate the final uncertainty and to apply designated soundings, not to set a depth range. The NOAA CUBE parameters mandated in HSSD were used for the creation of all CUBE BASE surfaces in survey H12367. All MBES data was acquired as developments of SSS contacts. For this reason, all MBES data was processed in accordance with object detection standards as set forth in HSSD section 5.2.2.1. The resolutions for MBES surfaces of 50cm and 1m and associated depth ranges meet object detection standards. Two separate SSS mosaics were created to complete the 200% SSS coverage that was required. The 200% lines were acquired at half the line spacing as the first 100% coverage, as specified in the Field Procedures Manual section 2.5.3.1.2.No additional horizontal or vertical control was conducted for this project, so no HVCR is included with this report. Mean Lower Low WaterTCARISolomons Island8577330Lewisetta, VA8635750Bishops Head85714218577330_verified.tidFinal Approved8635750_verified.tidFinal Approved8571421_verified.tidFinal ApprovedE349BH2012.tcFinalH12367.tcFinal2012-12-202013-01-24Two different TCARI tide corrector files were provided by CO-OPS for processing of final tides. The file E349BH2012.tc was provided to be used as the final grid between June 28 and October 28, 2012 and was controlled by 8577330 Solomons Island, 8571421 Bishops Head, and 8635750 Lewisetta. The file H12367.tc was provided to be used as the final grid between October 29, 2012 and December 19, 2012 and was controlled by 8571421 Bishops Head and 8635750 Lewisetta. After October 28, 2012, the stability of 8577330 Solomons Island is in question because of the effects of Hurricane Sandy. The only bathymetry data collected after October 28, 2012 using the adjusted TCARI grid was the MBES developments. As noted in section B.2.4 a comparison was performed between the MBES and VBES data. This in turn was also a comparison between the two different TCARI grids and the comparison concluded that the data were within the TVU for IHO Order 1 (Figure 5).Tide note is appended to this report.North American Datum of 1983 (NAD83)18NAnnapolis, MD (301 kHz)12230180000652011-102013-04-092013-04-13Sounding agreement between surveyed soundings on sheet H12367 and charted depths on chart 12230 were generally within two feet with most surveyed soundings being slightly deeper than the charted depth. One notable exception is at the 17 foot charted depth at position 38-16.57'N, 076-14.95'W where the soundings were surveyed at 21 feet and 22 feet (Fig 11). Contours generated in CARIS BASE Editor generally approximate the charted 30, 36, and 60 foot contours. The 18 foot contour generated in CARIS BASE Editor is generally further inshore than the charted 18 foot contour (Fig 12). 11Chart 12230 comparison between surveyed soundings and charted depths. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Chart_Comparison_12230.PNG12Chart 12230 comparison between surveyed and charted 18 foot contour. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Chart_Contours_12230.PNG1223357040000372007-012013-04-092013-04-13Sounding agreement between surveyed soundings on sheet H12367 and charted depths on chart 12233 were generally within two feet with most surveyed soundings being slightly deeper than the charted depth. One notable exception is the 12 foot charted depth at position 38-16.05'N, 076-14.72'W where the soundings were surveyed at 15 feet and 16 feet (Fig 13). Contours generated in CARIS BASE Editor generally approximate the charted 30, 36, and 60 foot contours. The 18 foot contour generated in CARIS BASE Editor is generally further inshore than the charted 18 foot contour (Fig 14). 13Chart 12233 comparison between surveyed soundings and charted depths. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Chart_Comparison_12233.PNG14Chart 12233 comparison between surveyed and charted 18 foot contour. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Chart_Contours_12233.PNG1226159840000302012-122013-04-092013-04-13Sounding agreement between surveyed soundings on sheet H12367 and charted depths on chart 12261 were generally within two feet with most surveyed soundings being slightly deeper than the charted depth. Notable exceptions are listed below. The 17 foot charted depth at position 38-16.56'N, 076-04.96'W has a surveyed sounding of 21 feet (Fig 15). The 12 foot charted depth at position 38-16.04'N, 076-14.29'W has a surveyed sounding of 15 feet (Fig 16). The 37 foot charted depth at position 38-12.68'N, 076-13.75'W has a surveyed sounding of 59 feet (Fig 17). Contours generated in CARIS BASE Editor generally approximate the charted 30, 36, and 60 foot contours. The 18 foot contour generated in CARIS BASE Editor is generally further inshore than the charted 18 foot contour (Fig 18). 15Chart 12261 comparison between surveyed soundings and charted depths. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Chart_Comparison_12261_1.PNG16Chart 12261 comparison between surveyed soundings and charted depths. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Chart_Comparison_12261_2.PNG17Chart 12261 comparison between surveyed soundings and charted depths. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Chart_Comparison_12261_3.PNG18Chart 12261 comparison between surveyed and charted 18 foot contour. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Chart_Contours_12261.PNG1226460440000312013-012013-04-092013-04-13Sounding agreement between surveyed soundings on sheet H12367 and charted depths on chart 12264 were generally within two feet with most surveyed soundings being slightly deeper than the charted depth. Notable exceptions are listed below. The 17 foot charted depth at position 38-16.55'N, 076-14.96'W has a surveyed sounding of 21 feet (Fig 19). The 12 foot charted depth at position 38-16.02'N, 076-14.28'W has a surveyed sounding of 15 feet (Fig 20). Contours generated in CARIS BASE Editor generally approximate the charted 36 and 60 foot contours. The 18 and 30 foot contours generated in CARIS BASE Editor is generally further inshore than the charted 18 and 30 foot contours (Fig 21). 19Chart 12264 comparison between surveyed soundings and charted depths. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Chart_Comparison_12264_1.PNG20Chart 12264 comparison between surveyed soundings and charted depths. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Chart_Comparison_12264_2.PNG21Chart 12264 comparison between surveyed and charted 18 and 30 foot contours. file:///M:/OPRE349BH212/Surveys/H12367/Compilation/Report/Components/SupportFiles/H12367_Chart_Contours_12264.PNGUS5MD21M40000182013-02-192013-03-21falseENC US5MD21M depths match RNC 12264 and RNC 12261 therefore all RNC comparisons stated in D.1.1 apply to US5MD21M. US5VA22M40000232012-10-262013-03-14falseENC US5VA22M depths match RNC 12233, RNC 12261, and RNC 12264 therefore all RNC comparisons stated in D.1.1 apply to US5VA22M. No AWOIS items exist for this survey.No Maritime Boundary Points were assigned for this survey.No charted features exist for this survey.No uncharted features exist for this survey.No Danger to Navigation Reports were submitted for this survey.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.Three bottom characteristics are included in the chart update product.A limited shoreline verification was performed in accordance with the project instructions. All assigned attributes inside the sheet limits were verified. Other features included in the Composite Source File were verified if possible even if they were not assigned. Three features included in the Composite Source File were not included in the Final Feature File in accordance with HSSD section 8.2 as they were directly associated with U.S. Coast Guard maintained ATONs. Refer to H12367_Final_Feature_File.000 for further information. Prior survey comparisons exist for this survey, but were not investigated.One ATON was investigated but not positioned as it was not assigned. It was found to be serving its intended purpose and the characteristics observed matched the chart and Light List. Overhead features do not exist for this survey.Submarine features do not 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.There is no present or planned construction or dredging 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, 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 Descriptive Report.LTJG Daniel D. SmithChief of Party2013-04-23Mr. Robert W. MowerySenior Survey Technician2013-04-23Data Acquisition and Processing Report2013-04-23Coast Pilot Report2013-04-19