OPR-L318-FA-13Approaches to LA Long Beach, CALong Beach, CANOAA Ship FAIRWEATHERH126204Not applicableApproaches to Long BeachCaliforniaUnited States100002013CDR David J. Zezula, NOAANavigable Area2013-08-012013-11-022013-11-11Multibeam Echo SounderMultibeam Echo Sounder BackscattermetersUniversal 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. Revisions and 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 Long Beach, CA, within the sub-locality of the Approaches to Long Beach.33.7283194444118.103533.5898527778118.0057H12620 Sheet Limitsfile:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/sheet%20limits_new.jpgSurvey Limits were acquired in accordance with the requirements in the Project Instructions and the HSSD.Survey limits were acquired in accordance with the modified sheet limits approved on Nov. 5 2013.The purpose of this project is to provide contemporary surveys to update National Ocean Service (NOS) nautical charting products. The project will cover critical areas as identified in the 2012 NOAA Hydrographic Survey Priorities (NHSP).The entire survey is adequate to supersede previous data.During acquisition on Survey H12620, 25m line spacing was run perpendicular to the shore between the 4m and 8m curve. The 4m curve was not fully developed due to high surf near shore and an abundance of recreational use in the surf zone. The hydrographer believes that there was still enough data collected to fulfill the survey requirements. Full 25m line spacing was not reached in some areas as well, for the same reasons. The 4m curve along the East Jetty off of Anaheim Bay was not fully developed due to kelp and an abundance of crab pot buoys. Figure 3 shows the combined 4m CUBE with a 4-8m surface where soundings 4m and shoaler appear red and 8m-4m soundings appear tan.H12620 4-8m Surface along the East Jetty entrance to Anaheim Bayfile:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/coverage%20east%20jetty.pngH12620 Survey Outlinefile:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/H12620_Survey_Outline.jpg28010248.25000006.57028050188.84000005.99028060142.770000039.98028070208.5800000000788.440000052.5406.660000020.32013-11-022013-11-032013-11-042013-11-052013-11-062013-11-072013-11-082013-11-11Re: Table 2--DPs were collected in the field, and are included in the Final Feature File. 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.28018.641.1228058.641.1228068.641.1228078.641.12RESON7125MBESRESONSVP71Sound Speed SystemSea BirdSBE 19PlusSound Speed SystemApplanixPOS/MV V4Positioning and Attitude SystemSea-Bird SBE 19Plus is a Conductivity, Temperature, and Depth profiler.Crosslines were collected, processed and compared in accordance with 5.2.4.3 of the HSSD. Surface differencing in CARIS Bathy DataBASE was used to assess crossline agreement with main-scheme lines. Figure 4 depicts a difference surface between a 4-meter surface made with main-scheme lines only and a 4-meter surface made with crosslines only. This difference surface is submitted digitally in the Separates II folder. Crossline and main-scheme differences (gray indicates agreement, cool colors indicate crosslines shoaler than main-scheme and warm colors indicate where crosslines are deeper)Crossline and main-scheme differences (gray indicates agreement, cool colors indicate crosslines shoaler than main-scheme and warm colors indicate crosslines are deeper)file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/MS_XL%20difference.png0.010.08280120.5280520.5280620.5280720.5The areas of overlap between the sheets were reviewed in CARIS Subset Editor for sounding consistency and by surface differencing 2 meter combined surfaces to assess surface agreement. The junction agreement is generally within the total allowable vertical uncertainty in their common areas and depths for all surfaces. Data overlap between all surveys was achieved. See figure 5 for planned areas of overlap. Junctions between H12618 and H12620file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/H12620_H12618_Junction.pngH1261860002013NOAA Ship FAIRWEATHERNWSurface differencing in CARIS HIPS and SIPS was used to assess junction agreement between H12618_MB_2m_MLLW_Combined surface and H12620_MB_2m_MLLW_Combined. The difference between surfaces were generally less than 0.5m and the few areas of larger differences are believed to be caused by rapid changes in slope. See Figure 6 for a graphical representation and figure 7 for statistical information of the surface differencing. Graphical representation of differences between junction H12618 and H12620.file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/H12618_H12620_Junction.jpgStatistical information for junction comparison between sheet H12618 and H12620. file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/H12618_H12620_Junction_Graphic.pngSonar system quality control checks were conducted as detailed in the quality control section of the DAPR.Hypack Data GapsDuring acquisition, data gaps occurred in the HYPACK/HYSWEEP software that lead to holidays in the raw data. Figure 8 shows examples of these data gaps.Example of HYPACK/HYSWEEP data gaps.file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/HYPACK%20data%20gaps.pngSurface Sound Speed SensorDue to adverse sea conditions in the survey area during acquisition, the launches experienced "pounding" or hard pitching when surveying into heavy seas or swells. This caused the surface sound velocimeter to make erroneous measurements causing periods of extreme refraction and profile bending. These errors occurred throughout H12620. An example of these errors, and the subsequent holidays that resulted can be seen at 33/40/31.23N 118/03/28.46W and are illustrated in Figures 9 and 10. The spikes caused by these errors were cleaned out and the profiles were rejected with interpolation.Example of bent profiles due to erroneous SSP measurements.file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/SSP%20Blowout%20with%20chart.pngHolidays created from cleaning SSP blowouts.file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/ssp%20holidays.pngKelpA kelp infested area SE of the entrance to Anaheim Bay at 33/42/15.6N 118/05/11.5W (Fig. 11) is present on rocky outcroppings. The area was cleaned to the substrate to the best of the Hydrographer's ability.Kelp area file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/Kelp%201.pngSound speed measurements were conducted as discussed in the Data Acquisition section of the DAPR.All equipment and survey methods were used as detailed in the DAPR.Holiday AssesmentComplete multibeam coverage was obtained within the limits of H12620. For holidays larger than three surface grid nodes, the corresponding multibeam side scan was examined and no navigationally significant items were found. The least depths of all navigationally significant features are represented by H12620 bathymetry. Holidays resulting from HYPACK/HYSWEEP data gaps are referenced above in Figure 8. Figure 10 under Surface Sound Speed sensor shows an example of holidays created by cleaning out erroneous Surface Sound Speed measurements. The holiday located at the entrance to Anaheim Bay has the least depth represented and is shown in Figure 12. Figure 13 shows the holidays resulting from the cleaning out of pilings that are part of Platform EMMY (chart 18746).H12620 Holiday due to heavy crab pots in the area of Anaheim Bay.file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/crab%20pot%20holiday.pngH12620 Holidays due to cleaning of Platform EMMY (chart 18746) from the HIPS Surface.file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/EMMY%20holidays.pngIHO UncertaintyAll data meet the data accuracy specifications as stated in the NOS Hydrographic Surveys Specifications and Deliverables (HSSD) dated April 2013. See Standards Compliance Review in Appendix V.The Standards Compliance Review document is included in Appendix II. DensityDensity requirements for H12620 were achieved with at least 99% of finalized surface nodes containing five or more soundings, see Standards Compliance Review in Appendix V. All data reduction procedures conform to those detailed in the DAPR.All sounding systems were calibrated as detailed in the DAPR.Raw Backscatter was logged as a 7k file and has been sent to the Processing Branch. One line per vessel per day of Backscatter was processed by the field unit.NOAA Profile V_5_3H12620_MB_1m_MLLWCUBE1NOAA_1mComplete MBESH12620_MB_2m_MLLWCUBE2NOAA_2mComplete MBESH12620_MB_4m_MLLWCUBE4NOAA_4mComplete MBESH12620_MB_1m_MLLW_FinalCUBE1020NOAA_1mComplete MBESH12620_MB_2m_MLLW_FinalCUBE21840NOAA_2mComplete MBESH12620_MB_4m_MLLW_FinalCUBE43680NOAA_4mComplete MBESH12620_MB_4m_MLLW_CombinedCUBE4080NOAA_4mComplete MBES The NOAA CUBE parameters mandated in the HSSD were used for the creation of all CUBE BASE surfaces in Survey H12620. The surfaces have been reviewed where noisy data, or "fliers," are incorporated into the gridded solutions causing the surface to be shoaler or deeper than the true sea floor. Where these spurious soundings cause the gridded surface to be shoaler or deeper than the reliably measured seabed by greater than the maximum allowable Total Vertical Uncertainty at that depth, the noisy data have been rejected and the surface recomputed.The combined surface "H12620_MB_4m_MLLW_Combined" was not submitted to the Processing Branch.Data LogsData acquisition and processing notes are included in the acquisition and processing logs, and additional processing such as final tide and sound velocity application is noted in the H12620 Data Log spreadsheet. All data logs are submitted digitally in the Separates I folder.Critical SoundingsDesignation of soundings followed procedures as outlined in section 5.2.1.2 of the HSSD. Survey H12620 requires 42 designated soundings to accurately represent the seafloor.Six additional soundings were designated during office review.Data Processing DeviationsWhile all Cross-lines were filtered to 45 degrees off nadir on both port and starboard, some data were re-accepted to fill gaps created by filtering.No additional Horizontal or Vertical Control Report will be submitted with H12620.Mean Lower Low WaterDiscrete ZoningLos Angeles, CA9410660Port San Luis, CA94121109410660.tidFinal ApprovedL318FA2013CORP_Rev.zdfFinal2013-11-122013-11-19Preliminary zoning is accepted as the final zoning for project OPR-L318-FA-2013.Tide station 9412110 (Port San Luis, CA) was not used for datum control for this survey.Tide Note is appended to this report.North American Datum of 1983 (NAD83)UTM Zone 11 NorthSmart BaseBLSABolsa Chica ChannelCAT2CAT2_SCGN_CS2000CAT3CAT3_SCGN_CS2008CCCSCarbon Creek Control StructureCRHSCRHS_SCGN_CS1999FVPKFairview ParkLBC2Long Beach CC 2P471SanJuanCrkCS2005PVE3Palos VerdesPVHSPeninsula High SchoolPVRSPVRS_SCGN_CS1998SACYSanta Ana Corp. YardSBCCSBCC_SCGN_CS1999TRAKBOOMER CANYONVTISMarine ExchangeVessel kinematic data were post-processed using Applanix POSPac processing software and SmartBase methods described in the DAPR. Smooth Best Estimate of Trajectory (SBET) and associated error (RMS) data were applied to all MBES data in CARIS HIPS with the exception of the following lines: 2805 2013M_3091915-2314 (SBET times are outside line times); 2801 2013X_3122156, 2013M_3112033 (SBET times are outside line times). For further details regarding the processing and quality control checks performed see the H12620 POSPAC Processing Logs spreadsheet located in the SBET folder with the GNSS data. See also the OPR_L318-FA-13 Horizontal and Vertical Control report, submitted under separate cover. Survey lines 2013M_3091915 through 3092314 are from vessel 2807 (and not 2805). Survey line 2801 2013M3112033 contained only 0.3 seconds of data and was deleted from the data set during office review. Bakersfield (305kHz)Point Loma (302kHz) Differential correctors from the U.S Coast Guard beacons at Bakersfield (305 kHz) or Point Loma (302 kHz) were used during real-time acquisition as noted in the acquisition logs.POSPac Error ValuesRoll, pitch, gyro, and navigation (and elevation) uncertainty values were supplied by an SBET RMS file generated by Applanix POSPac.A visual comparison of soundings and contours was conducted between the digital surfaces generated from the survey data and both raster charts for the area.18746189780000392013-062013-08-132013-08-24Soundings from survey H12620 generally agree within one to two fathoms of the charted depth. Contours generally agree with the chart except near the SW corner of the survey as noted in Figure 14 and West of Bolsa Bay as noted in Figure 15.Disagreement between charted contours (18746) and surveyed soundings SW of Huntington Beach.file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/18746%20contour%20discrepancy%201.pngDisagreement between charted contours (18746) and surveyed soundings West of Bolsa Bay. Charted 3fm contour no longer present.file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/18746%20contour%20discrepancy%202.png18749190320000432010-042013-08-132013-08-24Soundings from survey H12620 generally agree within one to two feet of the charted depth. Contours generally agree with the chart except SE of Sunset Beach as noted below in Figure 16.H12620 Chart 18749 Contour discrepancy. Charted 20ft contour no longer present SE of Sunset Beach.file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/18749%20contour%20discrepancy.pngUS4CA60M80000162013-05-282013-08-09falseSee discussion from Raster chart 18746 for more details.US5CA61M20000302011-05-132013-07-12falseSee discussion from Raster chart 18749 for more details.No AWOIS items were assigned for this survey.One AWOIS item (#53262) was assigned to the survey and the corresponding feature was found and corrected by the field unit. See the attached Features Report for specific details.No Maritime Boundary Points were assigned for this survey.All assigned charted features were investigated and are included in the survey Final Feature File. Survey H12620 has two previously uncharted wrecks. The wreck West of Sunset Beach at 33/42/51.4N 118/05/02.33W is approximately 4m long and 1m high with a least depth of 7.6m (25ft) as shown in Figure 17. The wreck South of platform Emmy on chart 18746 at 33/38.50N 118/02/15.48W is approximately 17.5m long and 1.8m high with a least depth of 14.64m as shown in Figure 18. Figure 19 shows an area at the entrance to Anaheim Bay that was inundated with crab pots. A holiday resulting from this is shown in Figure 12 under Additional Quality Control: Holiday Assessment.H12620 Previously uncharted wreck West of Sunset Beach on chart 18749file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/wreck_sunset_beach.pngH12620 Previously uncharted wreck South of platform Emmy on chart 18746file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/wreck_18746.pngH12620 Chart 18746 heavy crab pot use at entrance to Anaheim Bayfile:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/Crab%20Pots%203D%20with%20chart%2018746.pngFive new rocks and seven new obstructions were found during office processing at the branch and were included in the Final Feature file. No Danger to Navigation Reports were submitted for this survey.Survey H12620 includes one hazardous feature. A charted rock northeast of platform Emmy on chart 18746 has a new least depth of 2.3m and has a new position as shown in Figures 20 and 21. Recommendations are included in the Final Feature File for H12620. H12620 Charted rock Northeast of platform Emmyfile:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/rock%201.pngH12620 Charted rock East of platform Emmy new positionfile:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/rock%202.pngSurvey H12620 extends along a portion of the Southern border of the channel entrance to Anaheim Bay, but was not investigated.No bottom samples were required for this survey.No shoreline features were present within the bounds of this survey.No prior survey comparisons exist for this survey.Survey H12620 included two Aids to navigation (ATONs). The ATONs were found to serve their intended purpose.No overhead features exist for this survey.Survey H12620 includes three charted cable and pipeline areas on chart 18746 and two on chart 18749, as shown in Figures 22 and 23. While only one pipeline is charted as being attached to platform Emmy on chart 18746, multiple pipelines were observed in the area. The Hydrographer recommends retaining the cable areas as charted.H12620 Cable and Pipeline areas on chart 18746.file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/cables%20and%20pipelines.pngH12620 Cable and Pipeline areas on chart 18749file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/18749%20pipelines.pngNo ferry routes or terminals exist for this survey. Survey H12620 contains two permanent platforms on chart 18746. Figure 24 shows these platforms as being charted correctly. After verification, the platform data was removed from HIPS surfaces. Figure 13 under Holiday Assessment shows the resulting holidays around Platform Emmy.H12620 Platforms Eva and Emmy on chart 18746.file:///M:/OPRL318FA13/Surveys/H12620/Report/Original/Report/SupportFiles/Rigs.pngNo 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.CDR David J. Zezula, NOAACommanding Officer2014-05-21LT Ryan A. Wartick, NOAAField Operations Officer2014-05-21CST Tami M. BeduhnChief Survey Technician2014-05-21HSST Clinton R. MarcusSheet Manager2014-05-21Data Acquistion and Processing Report2013-05-21Coast Pilot Report2013-11-15